Open AccessThe 2007 Pisco, Peru, earthquake ( M 8.0): seismology and geodesy
Author(s) -
Biggs Juliet,
Robinson David P.,
Dixon Timothy H.
Publication year - 2009
Publication title -
geophysical journal international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0956-540X
DOI - 10.1111/j.1365-246x.2008.03990.x
Subject(s) - geology , seismology , epicenter , geodesy , geodetic datum , slip (aerodynamics) , interferometric synthetic aperture radar , seismic moment , moment magnitude scale , synthetic aperture radar , remote sensing , fault (geology) , geometry , physics , mathematics , scaling , thermodynamics
SUMMARY We investigate the 2007 Pisco, Peru, earthquake ( M 8.0) using seismological and geodetic data. Analysis of teleseismic records indicates that the earthquake is characterized by a steadily increasing moment rate, with the maximum occurring between about 55 and 70 s and the associated slip occurring about 40 km south of the epicentre. We combine InSAR data from L‐band (ALOS) and C‐band (Envisat) satellites to produce a 3‐D image of the ground displacements caused by the earthquake. Distributed slip inversions of the interferograms identify a single large patch of slip in the location of the maximum moment rate identified by seismology. Despite a clear spatial coincidence between the location of the coseismic slip and the anomalously high topography of the Paracas Peninsula, we find no evidence that the earthquake was directly responsible for motion on any upper plate faults.