Engineering summary
QuakeAlert combines P-ALERT P-wave sensors and PX-01 CUBE alarm units so an organization gets seconds of warning and automatic shutdowns before damaging earthquake shaking arrives.
In short: Organizations should have an earthquake warning system because it detects the faster, less damaging P-waves and acts in the seconds before destructive S-waves arrive. QuakeLogic's QuakeAlert uses P-ALERT and P-ALERT+ sensors running Pd, STA/LTA, PGA and displacement algorithms with on-site MMI intensity, and PX-01 CUBE alarm units with relays that shut off gas and electricity, open exits, sound sirens and send SMS/WhatsApp alerts.
Discover the QUAKELOGIC-QUAKEALERT system, our latest technology designed to give you a head start before an earthquake hits. This advanced system gives you critical time to prepare by detecting the initial, less harmful waves of an earthquake.
What makes the QUAKELOGIC-QUAKEALERT system stand out is its ability to work even in areas that are usually ‘blind spots’ for other earthquake detection methods. These are places close to fault lines where there isn’t enough equipment to catch early warning signs.
The QUAKELOGIC-QUAKEALERT doesn’t just warn you about an incoming quake; it takes action. It can automatically turn off gas, open emergency exits, shut down electricity, and activate alarms and lights to prevent damage and protect people.
It’s an all-in-one package that’s tailored for different organizations, providing essential alerts where others can’t.
P-ALERT+ Accelerograph AND EEW sensor
P-ALERT+ is a sophisticated seismic instrument designed to detect and measure ground motion and vibrations resulting from earthquakes and other seismic events. The device features high sensitivity and advanced processing capabilities, allowing it to accurately capture even small seismic signals.
It can activate the following algorithms: Pd Algorithm (P wave), STA/ LTA (Short Time Average/Long Time Average), PGA (Peak Ground Acceleration), and displacement. Additionally, it can measure the earthquake intensity on-site using the Modified Mercalli (MMI) scale.
The P-ALERT+ instrument is designed to be easy to install and operate. It can be connected to a variety of communication networks, including LAN, WAN, and cellular networks, allowing real-time data transmission and remote monitoring.
P-ALERT+ is also an accelerograph and records earthquake acceleration waveforms to be analyzed later by the user.
P-ALERT EEW Sensor
P-ALERT seismic sensor utilizes MEMS triaxial electronic accelerometers to detect the P-wave of an earthquake. It can activate the following algorithms: Pd Algorithm (P wave), STA/ LTA (Short Time Average/Long Time Average), PGA (Peak Ground Acceleration), and displacement. Additionally, it can measure the earthquake intensity on-site using the Modified Mercalli (MMI) scale.
P-ALERT also comes with three contact relays, and its Windows-based control software. P-ALERT can also be controlled by PX-01 CUBE.
PX-01 CUBE: Wall mount, touch-screen alarm unit with relays
PX-01 CUBE is a versatile and intelligent wall-mounted earthquake alarm that can function independently or be linked to a central warning system through a network connection.
When connected to a group of P-ALERT devices or a central warning network, the PX-01 Cube receives information about the earthquake’s timing, P-wave warning, and S-wave alarm. The Cube then displays the earthquake alarm, providing critical advance notice to those in the vicinity.
Furthermore, the PX-01 Cube can display text information, such as tsunami or aftershock data, received from a central warning system. This feature enhances its usefulness in disaster management and preparedness.
PX-01 Cube Features
- 7-inch industrial-colored touchscreen
- 3-color LED tower
- Regional earthquake early warning (EEW) messages can be received, and forwarded to other CUBEs for widespread coverage
- High-volume speaker, allowing pre-recorded voice or alarm warnings to broadcast
- Three contact relays to be configured based on custom thresholds
- Supporting IoT applications such as MQTT or LINE messages
Attributes of QUAKEALERT
Our integrated QUAKEALERT EEW solution provides advance warning to individuals and organizations, allowing them to take protective actions and mitigate potential damage to their assets. This solution can be used for both public alerting and automated protective actions, and it is highly scalable.
Detection of an imminent earthquake will trigger:
- Flashing lights on the wall-mounted display and LED towers
- Visual and audible countdown with a warning message
- Siren alert
- Automatic safe shut-down operations, gas valves, elevators, services or equipment
- PA and SMS/WhatsApp notifications to decision-makers
- De-energize electric control panels
- Opening gates
- Clearing and controlling access points The benefits of our solution can be measured both quantitatively and qualitatively. Quantitative benefits include reduced property damage, reduced risk to life, and improved response times. Qualitative benefits include increased public trust and confidence in emergency response capabilities.
Invest in Your Infrastructure’s Future
By implementing our QUAKEALERT system, you can:
- Protect your investment
- Ensure the well-being of your community
- Promote sustainable development
Contact Us Today
Learn more about how our EEW solutions can safeguard your structures. Reach out to our team of experts at sales@quakelogic.net to discuss your specific needs and requirements.
Key Takeaways
- P-ALERT and P-ALERT+ sensors run Pd (P-wave), STA/LTA, PGA and displacement algorithms and report on-site MMI intensity.
- P-ALERT+ is also an accelerograph that records acceleration waveforms; P-ALERT uses MEMS triaxial accelerometers.
- PX-01 CUBE: 7-inch touchscreen, 3-color LED tower, speaker, three configurable relays, MQTT and LINE messaging.
- Triggered actions include gas valve shutoff, elevator and equipment shutdown, de-energizing panels, opening gates and SMS/WhatsApp alerts.
- On-site sensors cover blind spots near fault lines where regional networks lack instruments.
Frequently Asked Questions
An on-site earthquake warning system detects the primary (P) wave, which travels faster and causes little damage, and triggers alerts before the slower, destructive secondary (S) wave reaches the site. QuakeLogic's P-ALERT sensors apply the Pd algorithm to the first seconds of P-wave motion, together with STA/LTA detection, PGA and displacement thresholds, to decide within seconds whether to raise an alarm.
Both sensors detect P-waves using the Pd, STA/LTA, PGA and displacement algorithms and estimate on-site intensity on the Modified Mercalli (MMI) scale. P-ALERT uses MEMS triaxial accelerometers, includes three contact relays and Windows control software, and can be controlled by the PX-01 CUBE. P-ALERT+ adds higher sensitivity and advanced processing, connects over LAN, WAN or cellular networks, and also functions as an accelerograph that records full acceleration waveforms.
When QuakeAlert detects an imminent earthquake it can flash wall displays and LED towers, run a visual and audible countdown, sound sirens, close gas valves, stop elevators and equipment, de-energize electrical control panels, open gates and emergency exits, clear access points, and send PA, SMS and WhatsApp notifications to decision-makers. The actions are configured through relay thresholds on each device.
The PX-01 CUBE is a wall-mounted, touch-screen earthquake alarm unit with a 7-inch industrial display, a 3-color LED tower, a high-volume speaker for pre-recorded voice or siren warnings and three contact relays set to custom thresholds. It works standalone or networked, receives P-wave warnings and S-wave alarms from P-ALERT sensors or a regional EEW feed, forwards messages to other CUBEs, shows tsunami or aftershock text, and supports MQTT and LINE.
Regional earthquake early warning networks rely on distant stations, so sites close to the fault often sit in a blind spot where the warning arrives late or not at all. On-site P-ALERT sensors detect the P-wave at the facility itself, which lets QuakeAlert trigger local alarms and automatic protective actions in the seconds that regional systems cannot provide for near-fault locations.
Related Articles
Need help with a project? QuakeLogic designs and supplies seismic monitoring, earthquake early warning, structural health monitoring, infrasound, and shake table systems. Browse QuakeLogic products or contact our engineering team with your site, structure, or test requirements.
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Topic cluster
Related engineering knowledge areas
- Earthquake EngineeringSeismic hazard, ground motion, structural response, fragility, and resilience guidance.
- Structural Health MonitoringMonitoring for bridges, buildings, dams, tunnels, industrial facilities, and resilient infrastructure.
- Earthquake Early WarningOn-site detection, alerting workflows, seismic switches, and critical infrastructure warning systems.
- Seismic SensorsSeismometers, accelerometers, geophones, sensor selection, calibration, and field deployment.
Definitions and references
Terms, standards, and source cues
- seismic hazard: related to Earthquake Engineering in this QuakeLogic knowledge cluster.
- ground motion: related to Earthquake Engineering in this QuakeLogic knowledge cluster.
- SHM: related to Structural Health Monitoring in this QuakeLogic knowledge cluster.
- damage detection: related to Structural Health Monitoring in this QuakeLogic knowledge cluster.
- earthquake early warning: related to Earthquake Early Warning in this QuakeLogic knowledge cluster.
- seismic switch: related to Earthquake Early Warning in this QuakeLogic knowledge cluster.
- seismometers: related to Seismic Sensors in this QuakeLogic knowledge cluster.
- accelerometers: related to Seismic Sensors in this QuakeLogic knowledge cluster.
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