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An effective early warning system does not begin with a siren. It begins with understanding the risk – understanding what could happen, which areas could be affected, how many people are located in those areas, and how much time they will have to evacuate safely. 

An emergency plan must therefore include modelling of a potential tailings dam or reservoir failure, a map of the potentially flooded area, identification of endangered communities, workplaces, and critical infrastructure, as well as the designation of evacuation routes and safe locations. Particular attention must be paid to schools, healthcare facilities, workplaces with large numbers of people, and individuals who may require assistance during evacuation. 

 Understanding and Assessing the Risk

Understanding the risk is followed by continuous monitoring of the mine or tailings dam. Sensors, geotechnical measurements, visual inspections, and other monitoring tools can detect deformation, unusual seepage, pressure changes, dam movements, or other indicators of deteriorating stability. However, detecting an anomaly does not automatically mean that a public alarm should be activated. 

The key stage is assessing the situation. The emergency plan must define in advance which measured values or combinations of events indicate a need for increased vigilance, a state of alert, or an imminent threat.

Emergency Plan: When Should Sirens Be Activated?

Not every warning requires the same response. Sirens, as a means of immediate mass warning, should be activated when the assessment indicates that people must take immediate action. At this stage, it is no longer merely about providing information. The Yes. Electronic sirens can be connected to sensors, SCADA platforms and control centres. This enables coordinated warnings and selective activation of individual sirens, specific zones or the entire network.  

sound of the siren must convey a clear instruction: stop what you are doing, leave the endangered area, and follow the designated evacuation route to safety. 

A well-prepared emergency plan therefore protects against two fundamental failures: 

• An unnecessary or unclear alarm that may undermine public trust. 

• A delayed warning or no warning at all, leaving people without sufficient time to reach safety. 

The purpose of monitoring is therefore not merely to know what is happening to the dam. Its real role is to enable timely decisions about whether the situation requires further observation, communication of information, or immediate activation of sirens and other warning channels. 

 What Should You Do When a Siren Sounds?

Even the most accurate monitoring and the fastest siren activation cannot guarantee safety if people do not know what to do after receiving a warning. The effectiveness of an early warning system therefore does not end with the activation of technology. Its final and decisive element is the correct and timely response of the population at risk. 

An emergency plan must therefore include clearly marked evacuation routes, safe locations, and assembly points. People must know which direction to take, which areas to avoid, and what to do if their usual route is impassable. The plan must also account for the fact that not everyone responds at the same speed. Special procedures are needed for children, older people, people with disabilities, and other disadvantaged individuals. 

The method of announcing that the danger has passed must also be defined separately. Returning to an evacuated area must not be based on the assumption that the situation is safe simply because the siren has stopped sounding.

 Emergency Drills

Regular simulation exercises are a key tool for preparedness. They also test the entire system in practice. They reveal whether the sirens are audible, whether people have correctly understood the meaning of the signal, whether evacuation routes are passable, whether signage is clear, and whether all groups of the population can reach safety within the time available according to the modelling. 

The success of a warning system is therefore not measured solely by whether the siren was activated. It is measured by whether people received the warning, understood its meaning, and managed to reach safety in time.

FAQ

The article was written by

Petra Rychtarcikova

Petra is an international business manager in charge of Spanish, French and Portuguese-speaking countries. Petra, with her global, economic and logistic background and knowledge of four languages, does very productive and responsible work for Telegrafia. Latin-American affairs, travelling, tourism and electronic sirens are her hobbies, and she is pleased to bring you exciting information from the Telegrafia world.

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When an earthquake warning siren sounds, there may be only seconds to react. Knowing the signal and knowing exactly what to do can therefore be just as important as the warning technology itself. 

This is why earthquake preparedness is deeply embedded in everyday life in some high-risk countries. In Mexico, for example, schoolchildren have been learning to recognize earthquake warning signals and practicing earthquake drills for more than 25 years. Chile also regularly conducts earthquake drills across schools and other educational institutions. The goal is simple: when a real warning comes, people should react automatically rather than waste valuable time deciding what to do.

How to React When an Earthquake Warning Sounds

If you are indoors, the generally recommended action is Drop, Cover, and Hold On. Get down, take cover under a sturdy table or desk if possible, protect your head and neck, and hold on until the shaking stops. 

Do not immediately run outside. Falling glass, façade elements and other debris can make areas close to buildings particularly dangerous during shaking. Doorways are also no longer considered a generally safer place in modern buildings, and the so-called “triangle of life” is not recommended by major earthquake-safety organizations. 

An emergency bag with water, a flashlight, first-aid supplies and other essentials should be prepared in advance and kept somewhere easily accessible. However, the first seconds after an earthquake alert should be used for immediate protection. The emergency kit becomes useful once the shaking has stopped and evacuation or further emergency action is required.

How Much Warning Time Can an Earthquake Early Warning System Provide?

There is no universal “one-minute warning”. 

The available time depends mainly on where the earthquake begins, where the person receiving the warning is located, and how quickly the detection and warning system reacts. In many earthquake early warning systems, the available lead time is a few seconds to several tens of seconds. Locations close to the epicenter may receive very little or even no advance warning. 

Mexico City is a well-known example where longer warning times can sometimes be achieved. For earthquakes originating in parts of the Guerrero coast, the geographical distance can provide approximately 60 seconds of warning before stronger seismic waves reach the city. This is a specific geographical advantage, however, and should not be presented as a standard warning time for every earthquake or every country. 

Even ten or twenty seconds can be valuable when people have been trained to respond immediately. 

What to Do After the Shaking Stops

Once the shaking stops, people should remain alert for possible aftershocks and follow instructions from local authorities or emergency services. If evacuation is necessary, this is the time to take the prepared emergency bag and move carefully to a designated safe area. Electronic sirens and voice messages can continue to play an important role at this stage by providing updated instructions, evacuation information or further warnings.

Why Electronic Sirens Are Important During Earthquakes

Earthquakes can disrupt exactly the infrastructure normally used to communicate with the public. Power can fail, telecommunications infrastructure can be damaged, and mobile networks may become congested as large numbers of people try to communicate at the same time. Federal Emergency Management Agency, the U.S. federal agency responsible for disaster preparedness and emergency management, notes that disasters can cause both physical communication failures and network overload. 

This is where electronic sirens provide an important additional warning channel. They can cover large outdoor areas immediately and do not require every person to have a charged phone, mobile signal or an active application. Telegrafia‘s earthquake warning solutions can automatically activate electronic sirens when dangerous seismic activity is detected. The system can also operate with backup power and communication infrastructure independent of common commercial infrastructure. 

Electronic sirens also provide more than a warning tone. Once the immediate danger has passed, voice messages, pre-recorded announcements or live instructions can tell people what to do next and support the coordination of emergency response. 

That combination of immediate activation, wide outdoor coverage, backup power, independent communications and clear voice instructions makes electronic sirens a particularly valuable part of an earthquake warning system. 

Technology can provide the warning. But preparedness determines how effectively people use those valuable seconds. 

FAQ

The article was written by

Róbert Jakab

Robert is like a moving photograph – because he is like a video. He can capture 60 frames per second. Whenever something happens, he records it. Currently, he’s working on smaller videos and hoping to make a feature film one day and then its sequel. Telegrafia 2: Monkey Power

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Crowded streets, cheering spectators and thousands of personal sporting ambitions: a city marathon brings people together in a unique atmosphere. Founded in 1924, the Košice Peace Marathon is Europe’s oldest marathon, and on 4 October 2026, it will once again fill the city’s streets with runners and supporters.

With thousands of people gathering along the route, public warning at sporting events becomes an important part of emergency preparedness. If an unexpected situation arises, organizers and emergency services need a reliable way to attract attention and provide clear instructions to participants and spectators.

 When Thousands Need to Hear the Message

At an event spread across a city, emergency communication must reach beyond the start and finish areas. Severe weather, a fire nearby or another incident may require people to leave a particular location, avoid an affected section, or follow instructions from emergency services. 

An acoustic warning can attract attention, while a spoken message can explain what people need to do. For an international audience, preparing concise instructions in relevant languages can also help visitors understand the situation. 

Effective warning therefore requires more than sufficient volume. Coverage, speech intelligibility, authorized activation and coordination with the event’s emergency procedures all need to be considered.

Pavian Sirens: Part of the City’s Safety Story

Košice has Pavian electronic sirens located around the marathon route as part of Slovakia’s national early warning and notification system. This infrastructure also provides a means of warning runners and spectators in the event of an emergency. 

Today, Telegrafia’s portfolio offers additional possibilities for designing warning arrangements around the needs of large outdoor gatherings. 

The current Pavian electronic siren combines remote control, comprehensive automatic diagnostics, and improved sound processing for greater speech intelligibility. Built-in backup batteries allow operation during a mains power failure, while multiple communication options provide flexibility when designing the system. 

Taking Public Warning Wherever It’s Needed

Permanent warning infrastructure can be complemented by equipment deployed for a specific event. 

Pavian Portable offers a way to provide temporary warning coverage where fixed sirens are unavailable, or additional coverage is needed. For a sporting event, potential locations could include temporary spectator areas or gathering points, with placement determined by the site’s acoustic requirements.  

Pavian Car brings acoustic warning and live voice announcements to a vehicle. It could support authorized teams communicating in accessible areas around the event, with the flexibility to move as the situation changes. 

These options allow warning coverage to be planned around both the permanent city infrastructure and the temporary layout of an event. 

 Keeping Warning Systems Ready with Vektra®

For a connected warning system, Vektra® Warning enables authorized operators to activate devices from a map or device list, monitor their status and organize sirens into groups. It also supports live voice broadcasts, prerecorded messages, and text-to-speech, helping operators deliver instructions appropriate to the situation. Remote diagnostics and silent testing support preparedness before an emergency occurs.  

For major sporting events, these capabilities can support a warning plan developed jointly with the relevant authorities and emergency services. 

As Košice looks forward to another marathon, we hope the sounds filling its streets will be those of cheering crowds and celebrations. No one wants warning sirens to be needed on such an occasion. Yet knowing that, should an emergency arise, there is a way to warn people and provide clear instructions is an important part of being prepared.

FAQ

The article was written by

Róbert Jakab

Robert is like a moving photograph – because he is like a video. He can capture 60 frames per second. Whenever something happens, he records it. Currently, he’s working on smaller videos and hoping to make a feature film one day and then its sequel. Telegrafia 2: Monkey Power

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When a tailings dam fails, time is critical. Huge volumes of water and mining waste can be released into a valley within a very short period, threatening workers, surrounding communities, infrastructure and the environment. This is precisely why tailings dams are among the most critical elements of mining infrastructure.

Their purpose is to safely store material left over after ore processing. However, if a dam fails, the consequences can be rapid and devastating. Monitoring alone is not enough – information about an impending danger must reach people before the flood wave does.

Lessons from the Past, When Minutes Mattered

The history of mining shows that a tailings dam failure is not necessarily a slow process that leaves enough time to respond. In some cases, enormous quantities of material have been released almost instantly, affecting communities and workers located downstream of the dam.

One of the most tragic events was the disaster at El Cobre, Chile, in 1965. A powerful earthquake caused the collapse of tailings dams at the El Soldado copper mine. The resulting mudflow almost completely buried the village of El Cobre and killed more than 300 people. Even six decades after the disaster, it is still described in specialist literature as one of the most serious mining disasters in Chilean history.

Brazil has also experienced devastating tailings dam disasters. When the Fundão tailings dam near Mariana collapsed in 2015, 19 people were killed and approximately 39.2 million m³ of mining waste was released. The mud subsequently travelled approximately 650 kilometres through the Rio Doce river basin to the Atlantic Ocean, making it one of the most serious environmental disasters in the history of Brazilian mining.

Only four years later, the Brumadinho disaster followed. On 25 January 2019, a tailings dam at the Córrego do Feijão mine collapsed, claiming 270 lives. Brumadinho subsequently became one of the main catalysts for the development of the Global Industry Standard on Tailings Management, introduced in 2020.

In Peru, one of the country’s most tragic mining disasters occurred at Chungar in 1971. A landslide from Cerro Chungar fell into Lake Yanahuín, displacing an enormous volume of water that subsequently struck the mining camp on the opposite shore. According to Peru’s INGEMMET, approximately 400 people lost their lives. Although this was not a tailings dam failure, but rather a landslide into a lake followed by a destructive wave, the event dramatically illustrates how quickly a catastrophic scenario can develop in a mining environment and how little time may be available for warning and evacuation.

Similar disasters are not limited to Latin America. In Val di Stava, Italy, the upper tailings dam collapsed in 1985, subsequently causing the failure of a second dam. Approximately 180,000 m³ of mud travelled down the valley at speeds approaching 90 km/h. A total of 268 people were killed.

In the United States, the Buffalo Creek coal waste impoundment dam in West Virginia failed in 1972. Approximately 132 million gallons of water and coal waste were released into the narrow valley, creating a wave up to approximately 25 feet high. The disaster killed 125 people, injured at least 1,100 and left approximately 4,000 homeless.

What do these events have in common? When a tailings dam fails, detecting the danger in time is not enough. The warning must reach people at risk quickly enough to give them a real chance to respond.

From Experience to Regulation: What Does Legislation Require Today?

Past tragedies have gradually changed the way governments approach tailings dam safety. In some countries, monitoring the dam and having an emergency plan are no longer sufficient. Modern legislation increasingly addresses how the population must be warned, as well as evacuation, system testing and redundancy.

One of the clearest examples is Brazil, where tailings dam disasters have led to significantly stricter mining dam safety regulations. Federal Law No. 12,334/2010, strengthened by Law No. 14,066/2020, explicitly provides for the installation of an audible warning system as part of the emergency action plan.

The current ANM Resolution No. 95/2022 goes even further: for specified categories of dams, it requires automated siren activation, with automatic activation complementing both local manual and remote control. For selected communities within the Zona de Autossalvamento (ZAS) – the Self-Rescue Zone, where the time available for intervention by emergency services is too short – the regulation explicitly requires a “sistema sonoro ou outra solução tecnológica de maior eficácia, com redundância”, meaning an audible warning system or another more effective technological solution with redundancy.

Even more detailed requirements apply in the state of Minas Gerais. The warning system must cover all people located within the ZAS, including persons with disabilities or special needs, and the system must be redundant. Regulations also address standardisation of siren sounds and emergency messages, coordination of alarms where multiple dams are located in the same valley, regular drills, and continuous readiness for system activation.

The Brazilian approach therefore clearly demonstrates that modern tailings dam warning is no longer simply about having a siren. It requires a complete, functional and regularly tested system capable of responding within seconds and minutes.

In Peru, Supreme Decree No. 034-2023-EM amended mining safety regulations in 2023 to introduce specific requirements for tailings management. Article 419 establishes that the emergency preparedness and response plan must take into account the possibility of a tailings dam malfunction or collapse.

Based on the results of risk identification and assessment, the response protocol should include “sistemas de detección de anomalías, alertas sonoras con decibeles y sonido diferenciado” – systems for detecting anomalies and audible warnings with a defined decibel level and distinguishable sounds – together with notifying affected persons, informing the relevant authorities and carrying out evacuation. These provisions remain part of the current edition of Peru’s mining safety regulations published by MINEM in 2026.

The Peruvian regulation is particularly noteworthy because it does not merely establish a general requirement to “warn the population”, but explicitly refers to:

• audible warnings (alertas sonoras),
• a defined sound level (decibeles),
• distinguishable sounds for individual warnings (sonido diferenciado).

In Chile, the main regulation governing tailings dam safety remains Supreme Decree No. 248/2006. It requires the emergency manual to include mapping of potentially affected areas, anomaly detection systems, alerts, notification of the relevant authorities and evacuation. The regulation itself does not specify a particular warning technology; however, sirens are used in industry practice. In its guide for preparing tailings dam emergency plans, Consejo Minero mentions, for example, a “código de sirena” as one of the tools for communicating with potentially affected communities.

In Colombia, Decree 539 of 2022, which regulates safety in open-pit mining, requires safety protocols to include communication between workplaces and the external environment of the mine, including “sistemas de alarma y alerta” – alarm and warning systems. The emergency plan must also include alarm systems, standardised response procedures and at least one emergency drill per year involving workers.

Detecting the Danger Is Not Enough

Past disasters and current regulatory developments demonstrate that monitoring the condition of a tailings dam and knowing that a problem has occurred are not enough. Warnings must reach people quickly, clearly and reliably, even if the power grid, mobile communications or one of the communication channels fails – and, most importantly, before the disaster itself reaches them.

This is why modern safety frameworks increasingly include requirements for audible warnings, redundancy, multiple activation methods, regular testing and integration of the warning system with monitoring, evacuation plans and civil protection.

FAQ

The article was written by

Petra Rychtarcikova

Petra is an international business manager in charge of Spanish, French and Portuguese-speaking countries. Petra, with her global, economic and logistic background and knowledge of four languages, does very productive and responsible work for Telegrafia. Latin-American affairs, travelling, tourism and electronic sirens are her hobbies, and she is pleased to bring you exciting information from the Telegrafia world.

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In industrial environments, reliable communication is not just about convenience. High noise levels, dust, moisture, vibration, large distances, and harsh operating conditions can make everyday communication difficult – exactly where fast and clear information is often most important.

Orcana , developed by Telegrafia, is a next-generation industrial intercom designed for reliable communication in demanding and noisy environments. It combines powerful audio, rugged construction, modern connectivity, and flexible control options in one device, helping workers and operators stay connected across industrial facilities.

Reliable Communication Where Standard Solutions Are Not Enough 

Production machinery, crushers, conveyors, heavy vehicles, and other industrial equipment can generate significant background noise. In these conditions, conventional communication devices may struggle to provide sufficient voice intelligibility.

Orcana is designed to deliver loud and clear voice communication even in noisy environments. A powerful integrated speaker, the option to connect an external speaker, advanced noise and echo cancellation (ANC/AEC), and automatic volume adjustment according to ambient noise help ensure that important messages can be heard and understood.

Its rugged IP65 industrial design provides protection against dust and water, while an operating temperature range from -40 °C to +70 °C makes Orcana suitable for demanding indoor and outdoor applications.

The intercom can be used for communication between workstations, calling operators, voice announcements, operational instructions, or requesting assistance. Depending on the configuration, it can also support access control and the operation of doors, gates, locks, signaling devices, and other connected equipment.

 One Industrial Intercom, Many Demanding Applications

Orcana is designed for industrial environments where noise, dust, distance, or difficult operating conditions make communication challenging.

A particularly strong application is mining, quarrying, and the extractive industry. Surface and underground mines can combine extreme dust, vibration, moisture, heavy machinery noise, and remote locations. Orcana can provide a dedicated communication point at crushing and screening lines, loading areas, conveyors, technological workstations, or other locations where workers need to communicate with operators and control rooms.

Similar conditions can be found in cement plants, lime plants, and aggregate processing facilities. Crushers, kilns, conveyors, and material handling systems create extremely dusty and noisy environments, while individual workstations may be spread across a large industrial site. A rugged industrial intercom allows communication points to be positioned directly where workers need them.

 Communication Across Large and Remote Industrial Sites

Tunnels and underground infrastructure bring another set of communication challenges. In road and railway tunnels, tunnel construction sites, or underground technological areas, Orcana can support communication between workers and operators, requests for assistance, operational instructions, and emergency communication procedures.

Large distances are also a major factor in ports and cargo terminals. Container handling equipment, loading and unloading operations, warehouses, and bulk material handling areas can create high levels of background noise across extensive sites. Industrial intercoms can be installed at strategic locations to improve coordination between workers, operational teams, gates, and control points.

Orcana is equally suitable for steel mills, metallurgical plants, and foundries, where machinery noise and extensive production areas require dependable communication between operators and control rooms. Other applications include power plants and energy facilities, railway depots and freight terminals, large automated warehouses, logistics centers, wastewater treatment plants, pumping stations, and water management facilities.

It can also support communication in oil and gas, chemical, and petrochemical facilities, depending on the requirements of the particular installation. For potentially explosive or otherwise specially classified areas, the suitability of the selected Orcana configuration must always be evaluated according to the required certifications and site conditions.

Across these industries, the objective is the same: to give workers a reliable and easily accessible communication point directly in the operational environment, even when that environment is noisy, dusty, remote, or otherwise demanding.

Flexible Communication and Integration 

Every industrial site has different requirements, which is why Orcana is available in three configurations: wall-mounted, desktop, and distributed. Each version is designed for a different type of installation and working environment.

 Wall-mounted version

A flexible solution for industrial and outdoor environments. The wall-mounted Orcana can be configured according to the specific requirements of the site, including the number of large mechanical buttons, user authorization options such as an RFID reader, GSM communication, as well as the speaker and microphone setup. This makes it suitable for a wide range of industrial applications and operating conditions.

 Desktop version

Designed for convenient communication in control rooms, gatehouses, operator stations, and other workplaces where the intercom needs to remain within easy reach. The desktop version is available with 8 or 16 buttons with two-colour LED indication, providing operators with clear and intuitive control.

Distributed version

When the intercom needs to adapt to the technology rather than the other way around. The distributed version can be integrated directly into walls, control panels, kiosks, stands, or technological equipment. Its low installation depth makes integration easier even where available space is limited.

Depending on the configuration, Orcana supports LAN with VoIP as well as 4G LTE / 2G GSM connectivity, making it suitable both for facilities with established network infrastructure and for remote locations where fixed connectivity may not be available.

Orcana can operate as a standalone industrial intercom or as part of the aSCADA® system. Within aSCADA®, it can serve as a remote communication and control unit or as a powerful external loudspeaker for voice announcements, extending its role beyond standard intercom communication.

Binary inputs and relay outputs allow integration with external switches, sensors, doors, gates, electromagnetic locks, or signaling devices. Flexible power options, including PoE, AC, and DC, further simplify installation across different industrial environments.

By combining robust construction, powerful audio, flexible connectivity, and integration capabilities, Orcana provides a communication solution designed around the realities of modern industrial operations.

When the environment gets demanding, communication needs to remain clear, fast, and reliable.

FAQ

The article was written by

Róbert Jakab

Robert is like a moving photograph – because he is like a video. He can capture 60 frames per second. Whenever something happens, he records it. Currently, he’s working on smaller videos and hoping to make a feature film one day and then its sequel. Telegrafia 2: Monkey Power

Listen to audio:

When an earthquake begins, every second matters. An earthquake early warning system can provide those valuable seconds by detecting seismic activity and rapidly activating warning and emergency response systems. 

It is important to understand that earthquake early warning does not predict earthquakes. The earthquake has already started when the system reacts. The warning is possible because different seismic waves travel at different speeds, while digital information can be transmitted much faster. 

The first waves to arrive are P-waves, which are generally less damaging than the stronger shaking that follows. Seismic monitoring equipment can detect these first signals, evaluate the event and send an alert before stronger ground motion reaches a protected location. Depending on the distance from the earthquake source and the system architecture, the available warning time may range from only a few seconds to a longer period. Areas very close to the epicenter may receive little or no advance warning. 

In simple terms, the process can be described as: 

seismic sensors → detection → evaluation → communication → sirens → Vektra® → first responders → automated actions  

How Seismic Sensors Detect an Earthquake

The warning process starts with seismic monitoring equipment. Seismometers and strong-motion sensors measure ground movement and convert it into data that can be analyzed automatically. A seismometer works using the principle of inertia. While the instrument moves with the ground, an internal mass reacts differently to that movement. This difference can be converted into an electrical signal representing ground motion. 

Modern seismic monitoring systems can identify seismic signals and evaluate whether predefined warning conditions have been reached. Regional systems may use data from several monitoring stations to estimate the location and magnitude of an earthquake or the expected level of shaking. Local systems can also operate using predefined thresholds or alarm outputs. 

Telegrafia’s earthquake early warning solution combines seismic monitoring with compatible third-party seismic sensors, connecting earthquake detection directly with public warning, notification and automated emergency response. So our main role begins where this detection layer connects to the warning infrastructure. Once a seismic monitoring system generates an alarm, the information can be transmitted to electronic sirens, control software, emergency personnel and connected technological systems. 

From Earthquake Detection to Public Warning

The biggest challenge in earthquake early warning is speed. Every unnecessary delay reduces the reaction time available before stronger shaking arrives. 

In a simple local installation, seismic monitoring equipment can be connected directly to an electronic siren. When the configured alarm condition is reached, the siren can activate automatically. For larger warning networks, the detection system can be integrated with the Vektra® software platform. 

Vektra® SCADA can monitor information from connected systems and trigger predefined processes when critical conditions occur. Vektra® Warning manages electronic warning devices and can automatically activate predefined warning scenarios. At the same time, Vektra® Notification can inform responsible personnel and first responders through channels such as SMS or voice calls. 

This means that one detected seismic event can initiate several actions almost simultaneously: electronic sirens can warn the population, emergency services can receive notifications and predefined emergency procedures can begin automatically. Electronic sirens can provide an acoustic warning signal and, depending on the system configuration, also broadcast pre-recorded messages, text-to-speech announcements or live voice instructions. The result is a coordinated process in which information moves rapidly from seismic detection to public warning and emergency response. 

 Automated Earthquake Warning and Emergency Response

An integrated earthquake warning system can also trigger actions beyond public warning. When connected to other technological systems, a detected earthquake can automatically initiate predefined protective procedures. For example, a SCADA-based system can be connected to infrastructure so that a critical event triggers an action such as shutting off a gas supply. 

Similar principles are used in earthquake early warning systems worldwide to protect industrial equipment, transport systems and critical infrastructure. Automated systems can react immediately, without waiting for a person to assess the situation manually. This is especially valuable because earthquake early warning may provide only a few seconds of reaction time. 

The overall effectiveness of the system therefore depends on the complete chain: reliable seismic detection, rapid evaluation, fast communication, public warning, first responder notification and automated response. 

Third-party seismic sensors provide the detection layer. Telegrafia’s warning infrastructure connects this information with monitoring station, electronic sirens, Vektra® applications, emergency personnel and other technological systems. 

The objective is not to predict when an earthquake will happen. It is to detect an earthquake that has already started and use the available seconds before strong shaking arrives as effectively as possible. 

FAQ 

The article was written by

Róbert Jakab

Robert is like a moving photograph – because he is like a video. He can capture 60 frames per second. Whenever something happens, he records it. Currently, he’s working on smaller videos and hoping to make a feature film one day and then its sequel. Telegrafia 2: Monkey Power

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Flood warning sirens remain a critical part of public safety, even in today’s digital era. Relying on mobile alerts, apps and online communication may seem like the most convenient and cost-effective way to warn the public. But digital communication alone is not enough. The devastating Texas Hill Country floods of July 2025 provided a tragic reminder of why.

One Disaster. Two Communities. Two Different Levels Of Preparedness

On July 4, 2025, catastrophic flash flooding struck communities along the Guadalupe River in the Texas Hill Country. In Kerr County, the river rose by approximately 26 feet in less than an hour, flooding summer camps, RV parks and communities along the river. The disaster ultimately claimed 139 lives across Texas, 119 of them in Kerr County alone. The flooding developed during the early morning hours, when many residents and visitors were still asleep. Although emergency alerts were issued, Kerr County had no outdoor flood-warning siren system in place. [1, 2]

The absence of sirens was not a new issue. Almost a decade earlier, in 2016, local officials had discussed upgrading the county’s flood-warning infrastructure. Former Kerr County Sheriff Rusty Hierholzer advocated for high-decibel outdoor sirens along the Guadalupe River, arguing that they should complement the county’s existing CodeRED phone notification system. His message at the time was remarkably clear: “You need both. You need the sirens, and you need CodeRED.” [1]

The proposed system was never implemented. Following the 2025 disaster, Texas Lieutenant Governor Dan Patrick reflected on the missing warning infrastructure: “There should have been sirens here.” [1]

 Just 20 Miles Away, the Story Was Different

Approximately 20 miles away, the small community of Comfort in Kendall County also faced rising waters — but its warning infrastructure included an additional layer.

Only a year earlier, the community had invested in an outdoor warning system consisting of two sirens. One of them was connected to a U.S. Geological Survey water-level sensor at Cypress Creek, allowing the system to be activated when water reached a predefined level, while still supporting manual activation. But Comfort did not rely on sirens alone. [3]

Emergency officials began monitoring the situation during the night. A command post was established at the local fire station by 4:30 a.m. The first wireless emergency alert was issued by 5:30 a.m., followed by additional alerts and a mandatory evacuation for residents near the river. At 10:52 a.m., both outdoor flood-warning sirens were activated. The sirens provided another direct warning to the community — one that did not depend on residents checking a phone, opening an app or being subscribed to a particular notification service. As Comfort Volunteer Fire Department Assistant Chief Danny Morales explained: “People knew that if they heard the siren, they gotta get out.” [3]

Despite significant flooding and damage, no one in Comfort died as a result of the flood. Local officials credited the community’s preparedness and multi-layered warning approach, including the sirens, with contributing to the rapid response. As Cruz Newberry, whose company installed the Comfort warning system, explained: “It’s difficult to ignore a siren blaring for three minutes straight.” [3]

While the two communities did not face identical circumstances, and sirens alone cannot explain their dramatically different outcomes, the contrast highlights an important principle of modern emergency management: No single warning channel can reach everyone, every time.

Digital alerts can deliver critical information quickly, but sending a message does not guarantee that it will be received, noticed or acted upon. As Chief W. Nim Kidd of the Texas Division of Emergency Management explained in the aftermath of the disaster: “Just sending the message is not the same as receiving the message“  [1]

Outdoor warning sirens provide an additional, independent layer — bringing the warning directly into the physical environment and helping authorities reach people who may not see, hear or receive a digital alert — including children, older adults, people experiencing homelessness, and those with limited access to mobile technology. They are especially critical at night, when people may be asleep, away from their phones or simply unable to react to a notification in time.

It raises a fundamental question for every community: How do we value human life — and how much should we invest in safety infrastructure to give every person the best possible chance of receiving and acting on a warning when disaster strikes?

The 21st-Century Siren Is More Than a Siren

Modern outdoor warning systems are no longer standalone devices designed simply to produce a loud alarm. They can become intelligent endpoints within a connected emergency warning ecosystem — integrating detection, decision-making, communication and public notification. PAVIAN, Telegrafia’s 4th-generation electronic siren, was designed exactly around this principle.

 What Should a Modern Siren System Deliver?

REACH — Make sure the warning reaches the right area

A siren is effective only if people can actually hear it. Using Telegrafia‘s proprietary Acusticus software, siren coverage can be engineered according to terrain, buildings, background noise and other real-world conditions — determining the optimal number, location and power of sirens required for each community.

UNDERSTAND — Not just an alarm, but instructions

In an emergency, knowing that something is wrong is only the first step. PAVIAN can broadcast warning tones as well as clear voice instructions with excellent speech clarity based on the STI standard (A++), to reduce confusion and guide people in those first critical minutes.

CONNECT — Sirens are part of the whole safety ecosystem

PAVIAN can integrate with sensors, monitoring platforms, control software and third-party systems. In a flood-warning scenario, information from water-level sensors or monitoring systems can therefore become part of an integrated chain from threat detection to public warning.

ACT FAST — Remote, centralized or automated activation

Warnings can be activated remotely and centrally, while integration with external monitoring systems can also enable automated warning scenarios. This helps reduce the critical time between detecting a threat and warning the population.

STAY OPERATIONAL — Designed for the moment when infrastructure is under pressure

Built-in backup batteries allow the sirens to remain functional during power outages. Multiple communication options, self-diagnostics and silent testing further support the reliability and readiness of the warning system.

Proven Flood Warning Experience Around the World

Our flood warning systems are already protecting communities in different parts of the world. In Kuala Lumpur, Malaysia, 33 electronic sirens are integrated with a forecasting and monitoring system and support autonomous alarm activation. In Yemen, PAVIAN sirens are connected to environmental sensors and centrally managed through our software VEKTRA®. These projects demonstrate how modern outdoor warning can connect monitoring, detection and public warning into one integrated system.

Our flood warning systems demonstrate how modern outdoor warning can connect monitoring, detection and public warning into one integrated system.

Read the full case study here

Read the full case study here

 So, Why Do Sirens Still Matter?

Because technology has changed. Disasters haven’t.

Disasters can strike at night, when people are asleep. Power may be out. Phones may be dead, out of reach or simply unnoticed. Yet people still need one clear message: “This is serious. You need to act now.”

Sirens bring that warning directly, immediately capturing attention and prompting people to act.

They do not replace digital alerts, mobile notifications or other emergency communication channels. Modern sirens provide one critical layer in a resilient, multi-channel warning system.

From detection to warning. From warning to action. SOUND THAT SAVES LIVES.

Sources

[1] ABC News – Hard-hit Texas county had no flood warning sirens despite past discussions
[2] Kerr County, Texas – July 4 Ceremony at Memorial Cross Planned in Kerr County
[3] PEOPLE – Texas Community Where No One Died During Flooding Credits Sirens with Saving Lives

The article was written by

Dominika Pavlíková

Dominika is an international business manager responsible for the US and Canadian markets. She is a woman full of energy that she needs to invest into meaningful things. That’s how she fell in love with the mass notification industry. Dominika is also passionate about learning and continuous development. She loves people, books, art, history and new challenges, which makes her feel more alive.

The way countries protect their citizens during emergencies is changing. As new threats emerge and technology evolves, governments around the world are modernizing their public warning systems to improve resilience and emergency response in the 21st century.

Modernizing a nationwide siren network is no longer just about replacing ageing infrastructure. It is about building a more resilient public warning system capable of responding to natural disasters, cyber incidents, industrial accidents, military threats, and other complex emergencies.

 From Traditional Sirens to Smart Warning Systems

Many existing national siren networks were built decades ago. While these emergency siren networks have proven reliable, maintaining ageing analogue infrastructure is becoming increasingly expensive, and older systems often lack the flexibility required for modern emergency management. 

At the same time, governments are introducing technologies such as Cell Broadcast and mobile alerting platforms, allowing authorities to send detailed emergency information directly to smartphones. These systems significantly improve communication, but they are only one part of the solution.

Why One Communication Channel Is Not Enough

Real-world experience has shown that mobile alerts should not become the only public warning system. Smartphones depend on telecommunications infrastructure that can be affected by power outages, cyberattacks, network congestion, or physical damage. Phones may also be switched off, out of battery, or simply not nearby when an emergency occurs. 

For rapidly developing situations, outdoor warning systems remain essential because they immediately capture attention and continue operating independently of mobile networks. Once people are alerted, mobile notifications can provide detailed instructions and updates. 

This is why emergency management experts increasingly recommend an integrated warning system that combines multiple communication technologies capable of delivering reliable nationwide alerts and warnings, even when one communication channel becomes unavailable. 

 Responding to Today’s Security Challenges

The need to modernize a warning system is no longer driven only by ageing infrastructure. Climate change, increasingly frequent floods, storms, wildfires, industrial accidents, cyber threats, and geopolitical tensions are forcing governments to rethink how they protect their populations. 

Modern public warning systems must be able to respond to a wide range of emergencies while supporting coordination between emergency services, authorities, and critical infrastructure operators. Increasingly, governments are also exploring technologies that can detect military threats while supporting civilian emergency response through an integrated civil-military warning network. 

The Future of Public Warning

The future of emergency communication lies in integration. Rather than relying on individual technologies, modern warning platforms combine outdoor sirens, mobile alerts, weather monitoring, sensor networks, emergency operation centers, and intelligent control systems into a single coordinated solution. As countries continue updating their national public alerting policy, the focus is shifting from individual technologies toward resilient ecosystems capable of operating under virtually any circumstances. 

Modernizing a public warning system is far more than replacing old sirens with new technology. It is about creating a resilient infrastructure capable of delivering reliable nationwide alerts and warnings through multiple communication channels – regardless of the type of emergency. 

As one of the world’s leading manufacturers of electronic sirens and integrated public warning systems, Telegrafia has spent more than a decade delivering comprehensive national warning solutions to customers around the world. Our systems go far beyond outdoor sirens, integrating emergency operation centers, mobile alerting, voice broadcasting, weather and sensor data, remote monitoring, and intelligent control technologies into a single integrated warning system. Designed to support everything from natural disasters and industrial accidents to civil protection and national security, these solutions help authorities respond faster, coordinate more effectively, and ultimately protect more lives.

The article was written by

Róbert Jakab

Robert is like a moving photograph – because he is like a video. He can capture 60 frames per second. Whenever something happens, he records it. Currently, he’s working on smaller videos and hoping to make a feature film one day and then its sequel. Telegrafia 2: Monkey Power

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Telegrafia, in cooperation with its partner MicroStep-MIS spol. s r. o., has successfully completed the delivery, installation and commissioning of a GIBON siren early warning system in Shahimardan, located in Uzbekistan’s Fergana Valley. The project was implemented under the United Nations Development Programme (UNDP) in close cooperation with the Ministry of Emergency Situations of Uzbekistan.

Located in eastern Uzbekistan, the Fergana Valley is one of the most densely populated regions in Central Asia. Surrounded by mountains, the area is particularly vulnerable to flash floods, mudflows and landslides, making reliable early warning systems essential for protecting local communities.

 Autonomous GIBON Electronic Sirens for Early Warning

The project included the installation of three autonomous GIBON siren systems at key locations throughout the area:

• Ministry of Emergency Situations operational centre
• Local primary school
• Pulmonology Sanatorium

Each installation includes a GIBON electronic siren, intelligent control electronics, battery backup, solar power supply and a robust mounting structure designed for reliable operation in demanding environmental conditions.

Following installation, all systems successfully passed functional testing and were officially commissioned. Comprehensive on-site training was also provided to emergency personnel, covering system operation, routine maintenance and manual activation procedures to ensure readiness during emergency situations.

 Modern Early Warning Systems Improve Disaster Preparedness

The GIBON  siren is a compact yet powerful electronic warning solution designed for industrial sites, critical infrastructure and local public warning applications. Thanks to its low power consumption and autonomous solar operation, it is particularly suitable for remote locations where access to a stable power supply may be limited.

This successful deployment demonstrates how modern warning technologies can significantly improve preparedness for natural hazards while remaining easy to install, operate and maintain. It also reinforces Telegrafia‘s long-term commitment to supporting disaster risk reduction projects around the world.

We would like to express our sincere appreciation to our partner, MicroStep-MIS spol. s r. o., as well as to the Ministry of Emergency Situations of Uzbekistan and UNDP, for their excellent cooperation, professionalism and commitment throughout the project. Their collaborative approach and dedication were instrumental in the successful implementation of this important early warning initiative.

Today, Telegrafia’s warning solutions protect communities in more than 100 countries, helping governments, emergency services and critical infrastructure operators respond more effectively to natural disasters, industrial accidents and other emergencies.

The article was written by

Monika Pavlik

Monika is an international business manager for Balkan, Benelux and Scandinavian states. She worked with a diverse range of organisations, including government institutions, IGOs in the field of migration, private sector and non-profits. The mentioned experience laid a sound foundation for a challenging and meaningful job she has in the Telegrafia Company. Therefore, she is very excited about bringing you the latest news from the field of early warning and notification systems.

 Modern Testing Is About Much More Than the Sound of a Siren

Electronic siren testing plays a critical role in ensuring that public warning systems are ready when an emergency occurs. During every scheduled test, the system verifies not only the warning signal itself but also communication, power supply, diagnostics, and the overall readiness of the entire warning infrastructure.

The siren sounds. Most people know it is a scheduled test and continue with their daily activities a few moments later. Few realize, however, that during those few seconds, much more than the siren’s sound is being verified.

In reality, a comprehensive inspection of the entire public warning system is taking place. The goal is not only to confirm that the siren can produce a warning signal, but also to verify the readiness of the technology that may determine the speed and reliability of public warning during a real emergency.

That is why testing is one of the most important aspects of operating electronic sirens.

Testing Is More Than a Routine Siren Check

At first glance, a siren test may seem straightforward—the system is activated, a warning tone is played, and the test is complete.

In practice, however, its purpose is much broader. Testing verifies whether the entire solution is ready to operate reliably under real-world conditions. This includes not only the siren itself, but also communication, power supply, diagnostics, and the interaction of all system components.

To verify the readiness of electronic sirens, two basic types of tests are used: audible tests and silent tests. Each examines a different part of the system, and only together do they provide a complete picture of its technical condition.

 Audible Tests Verify Operational Readiness

Audible tests are the ones familiar to the public. During these tests, the warning tone or a voice message is activated, allowing the system to be evaluated under real operating conditions.

Their purpose is to confirm that the siren can reliably perform its primary function—warning the public in time when an emergency occurs.

Audible tests typically verify:

• correct siren activation,
• proper operation at full operating power,
• cooperation between individual system components,
• correct functioning of protection mechanisms,
• the siren’s acoustic performance and audibility throughout the protected area.

These tests also verify how the equipment behaves under actual operating load and confirm that all components function correctly while broadcasting the warning signal.

 Silent Tests Detect Problems Before They Become Critical

Not every test has to be accompanied by sound.

Electronic sirens allow silent testing, which is performed without activating the warning signal. Its primary purpose is to continuously monitor the technical condition of the equipment without disturbing residents or interrupting normal operations.

During silent tests, the system primarily verifies:

• proper operation of individual subsystems,
• communication between the siren and the control system,
• device configuration, calibration, and diagnostics,
• primary and backup power supplies,
• readiness for immediate activation.

Audible and silent tests complement each other. While audible tests verify how the system performs externally, silent tests provide detailed insight into its internal technical condition.

Their importance also lies in the fact that they can be performed much more frequently than audible tests. This allows operators to identify deviations or emerging faults without waiting for the next scheduled audible test.

Regardless of whether a test is audible or silent, every test provides valuable information about the condition of the equipment. This is one of the greatest advantages of modern electronic sirens.

 The Real Outcome of Testing Is Data

From the public’s perspective, a siren test lasts only a few seconds. For the system operator, however, those few seconds generate a valuable dataset that provides a detailed picture of the equipment’s technical condition.

During each test, electronic sirens record telemetry data, diagnostic reports, test results, and any alarms or deviations from normal operation. This information helps identify developing issues before they can affect the reliability of the warning system.

In modern public warning systems, it is no longer enough to know that the siren sounded. It is equally important to understand how the entire system performed during the test and whether every component operated as expected.

The collected data is then transmitted to the central control software, where operators can continuously analyze and evaluate it. In Telegrafia solutions, this task is performed by Vektra®, which enables operators to review test history, identify anomalies, and schedule maintenance before a minor issue develops into a system failure.

The result is much more than confirmation that the test was successful. Operators gain a comprehensive overview of the equipment’s technical condition, can monitor its performance over time, and respond promptly to changes that could affect the reliability of public warning.

Electronic Siren Testing as Part of Reliable Public Warning 

Testing procedures may vary from country to country depending on legislation and the organization of public warning systems. However, one common trend is the growing emphasis on continuous diagnostics, remote monitoring, and regular verification of equipment health.

For example, during Germany’s nationwide Warntag (National Warning Day), not only sirens but also various other public warning channels are tested. Similar emphasis on reliability and continuous monitoring can be found in many other countries, where public warning systems are becoming an integral part of national safety infrastructure.

Modern electronic sirens are therefore much more than devices that simply reproduce warning signals. They are intelligent components of integrated public warning systems, providing continuous diagnostics, remote supervision, and more efficient management of the entire infrastructure.

If you would like to learn more about how electronic sirens work or the benefits of replacing older systems, we also recommend our articles explaining the operating principles of electronic sirens and the advantages of upgrading legacy electromechanical sirens with modern electronic warning systems.

A Few Seconds That Make All the Difference

The next time you hear a siren test, you may see it differently.

It is not just a brief sound confirming that the equipment is working. It is a comprehensive verification of the entire public warning system—from communication and power supply to diagnostics and the performance of every critical component.

Because when it comes to protecting communities, what matters most is not that the siren works during a scheduled test. What truly matters is having confidence that it will perform reliably when the test is over and a real emergency occurs.

The article was written by

Tomáš Marčák

Tomáš combines an engineering mindset with a passion for innovation, business, and effective communication. At Telegrafia, he contributes to projects that transform technology into practical solutions, helping make communities safer and better informed. Outside of work, he enjoys travelling, sports, and exploring new cultures. Driven by curiosity and continuous learning, he is always seeking new challenges, experiences, and opportunities for personal and professional growth.