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748 Seismological Research Letters Volume 80, Number 5 September/October 2009 doi: 10.1785/gssrl.80.5.748 INTRODUCTION
 

Summary: 748 Seismological Research Letters Volume 80, Number 5 September/October 2009 doi: 10.1785/gssrl.80.5.748
INTRODUCTION
Earthquake early warning (EEW) systems provide real-time
estimates of earthquake source and ground motion parameters
to users before strong ground shaking occurs at sites of interest
(Kanamori
fact that the most destructive ground shaking during an earth-
quake is caused by - and surface waves, which travel much
slower than P waves and also slower than electromagnetic sig-
nals carrying warnings to potential users. Real-time informa-
tion systems can minimize loss of life and property damage and
are therefore an important tool in short-term seismic hazard
mitigation and disaster management (Wenzel 2001). If
an alarm can be issued seconds before the onset of the strong
ground motions, automatic emergency actions can be initiated
such as slowing down high speed trains or shutting down com-
puters or gas distribution, for instance (Goltz 2002).
EEW systems are of two main types, regional and on-site.
e former uses a dense network of seismic stations to locate
the earthquake, determine its magnitude, and estimate the

  

Source: Allen, Richard M. - Seismological Laboratory, Department of Earth and Planetary Science, University of California at Berkeley

 

Collections: Geosciences