The Potential for Earthquake Early Warning in Southern California
- 2 May 2003
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 300 (5620), 786-789
- https://doi.org/10.1126/science.1080912
Abstract
Earthquake mitigation efforts in the United States currently use long-term probabilistic hazard assessments and rapid post-earthquake notification to reduce the potential damage of earthquakes. Here we present the seismological design for and demonstrate the feasibility of a short-term hazard warning system. Using data from past earthquakes, we show that our Earthquake Alarm System (ElarmS) could, with current TriNet instrumentation, issue a warning a few to tens of seconds ahead of damaging ground motion. The system uses the frequency content of the P-wave arrival to determine earthquake magnitude, an approach that allows magnitude determination before any damaging ground motion occurs.Keywords
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