Publication Date:
2017-04-04
Description:
We image the rupture history of the 2009 L’Aquila (Central Italy) earthquake using a
nonlinear joint inversion of strong motion and GPS data. This earthquake ruptured a
normal fault striking along the Apennines axis and dipping to the SW. The inferred slip distribution is heterogeneous and characterized by a small, shallow slip patch located up-dip from the hypocenter (9.5 km depth) and a large, deeper patch located southeastward.
The rupture velocity is larger in the up-dip than in the along-strike direction. This
difference can be partially accounted by the crustal structure, which is characterized by a high velocity layer above the hypocenter and a lower velocity below. The latter velocity seems to have affected the along strike propagation since the largest slip patch is located at depths between 9 and 14 km. The imaged slip distribution correlates well with the on-fault aftershock pattern as well as with mapped surface breakages.
Description:
Published
Description:
L19304
Description:
3.1. Fisica dei terremoti
Description:
JCR Journal
Description:
reserved
Keywords:
2009 L'Aquila earthquake
;
kinematic inversion
;
joint inversion
;
04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamics
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
