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The Potential for Earthquake Early Warning in Southern California
Richard M Allen
University of Wisconsin-Madison
Hiroo Kanamori
California Institute of Technology
Science, 300, 786-789, 2 May 2003
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.
Download reprint: AllenKanamoriElarmSScience2003.pdf (0.35Mb)
Supplementary online material: AllenKanamoriElarmSScience2003SOM.pdf (0.91Mb)
Also see the ElarmS webpage
Press coverage
© Richard M Allen
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