Earthquake early warning app
In the ATTAC project (2016-2024) in Central America, the Real-time Seismology group created an EEW cell phone application that allows agencies operating EEW to directly deliver alerts (Massin et al., 2024). Messages to the app are directly triggered by the ESE software and alerts for either VS, FinDer, or both may be delivered. Messages are shared using Google's free Firebase Cloud Messaging (FCM) service, which provides delays on the order of 2-5s for most users. A separate app was developed for Android and iOS. Currently, magnitude and location are sent to the app, which then provides warnings that depend on the user's location and the estimated shaking, with multiple alert levels. The delay is tracked for each message, and the user can report felt intensities following EMS-98 using EMSC pictograms (Bossu et al., 2017). In the summer of 2024, this mobile application was providing EEW to around 100,000 recipients in each of Costa Rica and Guatemala.
Earthquake early warning display (EEWD)
The Earthquake Early Warning Display (EEWD) is a free and open-source Java software to display earthquake early warning (EEW). The EEWD was developed as part of a European effort led by the Swiss Seismological Service at ETH Zurich. The EEWD is client-side software that can receive alerts generated by multiple EEW algorithms used in Europe, which include VS and FinDer through the ESE framework but also Presto. EEWD can use local ground-motion prediction equations (GMPEs), ground-motion-to-intensity conversion equations (GMICEs), and local site effect information. In addition to real-time operations, the EEWD can replay recorded real-time earthquake alerts and play scenarios. The EEWD can be viewed as a tool to broadcast real-time or near-real-time information to end users, including, but not restricted to, EEW alerts.
The EEWD was originally developed in project REAKT. Current and future versions and releases will be based on collaborative code development through GitHub (https://github.com/SED-EEW/EEWD). The EEWD is already operated by selected academic and/or research institutions and private and public stakeholders in the Euro-Mediterranean region and in Central America.
