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Ground motion recordings from the MW 6.3 2009 L’Aquila earthquake in Italy and their engineering implications
Author(s)
Language
English
Obiettivo Specifico
4.1. Metodologie sismologiche per l'ingegneria sismica
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
1/28(2012)
ISSN
8755-2930
Pages (printed)
317-345
Issued date
2012
Subjects
Abstract
The 2009 L’Aquila earthquake sequence includes the April 6 Mw 6.3 main
shock and triggered events on April 7 and 9, each recorded on a digital network
having five stations on the hanging wall of the main shock fault. We describe a
geometric source model drawing upon inversions by others. We describe
record-specific ground motion data processing that includes the incorporation of
static displacements of up to 13 cm (downdrop of hanging wall). The resulting
database includes 47, 38, and 31 corrected triaxial recordings from the April 6,
7, and 9 events, respectively. We present site conditions for recording stations,
including recent surface wave and borehole geophysics. We demonstrate that
the high-frequency data are weaker than expected for normal fault earthquakes
of these magnitudes and that the data attenuate with distance at rates generally
consistent with modified next generation attenuation (NGA) equations for Italy
that were available prior to the event.
shock and triggered events on April 7 and 9, each recorded on a digital network
having five stations on the hanging wall of the main shock fault. We describe a
geometric source model drawing upon inversions by others. We describe
record-specific ground motion data processing that includes the incorporation of
static displacements of up to 13 cm (downdrop of hanging wall). The resulting
database includes 47, 38, and 31 corrected triaxial recordings from the April 6,
7, and 9 events, respectively. We present site conditions for recording stations,
including recent surface wave and borehole geophysics. We demonstrate that
the high-frequency data are weaker than expected for normal fault earthquakes
of these magnitudes and that the data attenuate with distance at rates generally
consistent with modified next generation attenuation (NGA) equations for Italy
that were available prior to the event.
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