Publication Date:
2020-02-25
Description:
We present rupture details of the Mw 6.3 April 6, 2009
L’Aquila earthquake derived by back‐projecting teleseismic
P waves. This technique has previously been applied to large
magnitude earthquakes, but this is the first application to a
moderate size event. We processed vertical‐component
seismograms for 60 broadband stations obtained from the
Incorporated Research Institutions for Seismology (IRIS)
data center. The traces were aligned and normalized using
a multi‐channel cross‐correlation algorithm and 4th root
stacking was used to image the rupture. We found that the
L’Aquila earthquake ruptured towards the south and that a
second discrete pulse of energy occurred 20–25 km east
of the epicenter about 17–18 s after the nominal origin
time. The spatial extent of the rupture image correlates
well with a post‐seismic survey of damage in the region.
Because the technique is potentially very fast (images can
be produced within 20–30 minutes of the origin time), it
may be useful to governmental agencies tasked with
emergency response and rescue.
Description:
Published
Description:
L03301
Description:
4.2. TTC - Modelli per la stima della pericolosità sismica a scala nazionale
Description:
JCR Journal
Description:
reserved
Keywords:
L'AQUILA EARTHQUAKE
;
BACK_PROJECTION
;
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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