Publication Date:
2017-04-04
Description:
Effective tsunami early warning for coastlines near a tsunamigenic earthquake requires
notification within 5-15 minutes. We have shown recently that tsunamigenic earthquakes
have an apparent rupture duration, T0, greater than about 50 s. Here we show that T0 gives
more information on tsunami importance than moment magnitude, Mw, and we introduce a
procedure using seismograms recorded near an earthquake to rapidly determine if T0 is likely
to exceed T=50 or 100 s. We show that this “duration-exceedance” procedure can be
completed within 3-10 min after the earthquake occurs, depending on station density, and that
it correctly identifies most recent earthquakes which produced large or devastating tsunamis.
This identification forms a complement to initial estimates of the location, depth and
magnitude of an earthquake to improve the reliability of tsunami early warning, and, in some
cases, may make possible such warning.
Description:
DPC-S3 2007-2009
Description:
Published
Description:
L09306
Description:
1.1. TTC - Monitoraggio sismico del territorio nazionale
Description:
JCR Journal
Description:
open
Keywords:
tsunami
;
fault rupture
;
early warning
;
04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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