Development and Testing of an Alaska Earthquake Testsuite Within Epic
Description:
The ShakeAlert earthquake early warning system, and specifically the EPIC detection algorithm, has successfully detected and facilitated public alerts for numerous events along the west coast of the contiguous United States over the past six years. Through ongoing analysis of algorithm performance, we can identify areas that need improvement and propose changes to the system. Historic earthquakes provide an important supplement to real-time testing to account for less common earthquake rupture parameters. One scenario that can likely benefit from more testing and development is large, offshore, and deep earthquakes. Understanding EPIC’s performance in these environments is important when preparing for potential future earthquakes, including offshore ruptures along the Cascadia subduction zone.
To this end, we create a new testsuite of recent moderate to large earthquakes focused on a range of environments in the South Central and Aleutian Islands regions of Alaska as recorded at locally managed broadband and strong motion sensors. We then use this developed testsuite to test the current production version of EPIC as well as currently proposed versions (bEPIC) for its alert quality and timeliness. Through this test we will do two things: first we will assess EPIC’s usefulness in any expansion of earthquake early warning to Alaska, and second, we will gain a diverse set of solution results that we can use to improve EPIC’s performance over its current alerting zone within California, Oregon, and Washington.
Session: Performance and Progress of Earthquake Early Warning Systems Around the World - I
Type: Oral
Date: 4/16/2025
Presentation Time: 08:45 AM (local time)
Presenting Author: Amy
Student Presenter: No
Invited Presentation:
Poster Number:
Authors
Amy Williamson Presenting Author Corresponding Author amy.williamson@berkeley.edu University of California, Berkeley |
Angie Lux angie.lux@berkeley.edu University of California, Berkeley |
Ivan Henson ihenson@berkeley.edu University of California, Berkeley |
Andrei Akimov andrei.akimov@berkeley.edu University of California, Berkeley |
Richard Allen rallen@berkeley.edu University of California, Berkeley |
|
|
|
|
Development and Testing of an Alaska Earthquake Testsuite Within Epic
Category
Performance and Progress of Earthquake Early Warning Systems Around the World