Low-Latency Digitization, Communication and Alerting for Earthquake Early Warning Systems: Güralp Minimus
Earthquake Early Warning Systems (EEWS) must combine low-latency digitization, communication, and computational processes to be effective. This maximizes the time between the characterization of an event and the warning of the population, thereby providing the longest warning time. Güralp Systems Ltd. (GSL) has developed the Minimus digitizer with a range of smart features that reduce latency to 40ms from signal input to digital output.
Minimus makes use of standard processing techniques such as causal FIR filters to reduce the digitization delay. GSL has also developed and equipped Minimus with the proprietary GDI-link streaming protocol to further reduce the delays in data communication. GDI-link streams data sample-by-sample and will dynamically adjust to the available bandwidth, therefore providing a fast and reliable communication protocol compared to traditional packetization protocols. This results in the transmitted data having a dramatically lower mean latency.
Minimus combines familiar STA/LTA algorithms with simple machine-readable event messages to alert operators and populations to impending ground shaking. When in a triggered state, the Minimus will instantly send a Common Alert Protocol (CAP) event message to a designated receiver containing the station metadata that indicates an event has occurred. The Minimus will locally compute the PGA, PGV and PGD parameters from the triggered event and will subsequently send these calculations as a secondary CAP message. CAP messaging makes use of existing internet infrastructure and is already widely used in public communications which will aid EEW network operators with regards to implementation.
The Minimus has been designed as either a standalone digitizer or can be integrated into the Fortimus accelerometer and the Certimus broadband seismometer. The integrated systems provide compact and easy-to-deploy systems that are suitable for widescale EEW deployments.
Session: End-to-End Advancements in Earthquake Early Warning Systems [Poster Session]
Type: Poster
Room: Exhibit Hall
Date: 5/3/2024
Presentation Time: 08:00 AM (local time)
Presenting Author: James Lindsey
Student Presenter: No
Additional Authors
James Lindsey Presenting Author Corresponding Author jlindsey@guralp.com Guralp Systems Ltd. |
Neil Watkiss nwatkiss@guralp.com Guralp Systems Ltd. |
Phil Hill phill@guralp.com Guralp Systems Ltd. |
John O'Neill joneill@guralp.com Guralp Systems Ltd. |
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Low-Latency Digitization, Communication and Alerting for Earthquake Early Warning Systems: Güralp Minimus
Category
End-to-End Advancements in Earthquake Early Warning Systems
Description