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Numerous methodologies for Earthquake Early Warning (EEW) exist and have been hardened into production-level software at many networks. Mostly, these implementations are standalone programs independent of the operational earthquake monitoring systems that provide network locations within minutes of an earthquake. Therefore, to manage such an EEW infrastructure is ressource-expensive and most tasks, just as streaming / managing metadata / archiving performance / staging playbacks need to be implemented differently in each environment. This means operating EEW becomes a major effort requiring significant resources, which hampers networks to evaluate their readiness for EEW and demonstrate EEW to potential end-users. The SED has been developing methods and open-source software for Earthquake Early Warning for 10 years. The seismic network at SED migrated to SeisComP3 (SC3) for automated seismic bulletin generation in 2012. Since then, all software for EEW are developed as modules within an SC3 framework. In this presentation, we describe the Virtual Seismologist (VS) and Finite-Fault Rupture Detector (FinDer) methodologies and show how they are integrated into SC3. VS is a traditional approach that builds on existing SC3 detection and location modules for point-source models. FinDer matches growing patterns of observed ground motion with modelled templates to identify line faults, and hence can infer on-going finite-fault rupture in realtime. Together these methods can provide EEW for all event dimensions from moderate to great, if there is a high quality, EEW- ready, seismic network in place. We also describe the desktop EEW Display tool (EEWD) that receives and displays EEW messages and can be used to demonstrate EEW. The EEW package in SC3 is deployed for testing in various places including Switzerland, Central America and Chile. We summarise performance in key events. Providing our open-source modules within SeisComP3 means operators interested EEW that operate SC3 can easily evaluate the potential for EEW in their network - a single agency can operate both the traditional monitoring and EEW using a minimum of resources. Show more
Book titleBook of Abstracts of the 36th General Assembly of the European Seismological Commission
Pages / Article No.
Organisational unit02818 - Schweiz. Erdbebendienst (SED) / Swiss Seismological Service (SED)
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