Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/7439
AuthorsStramondo, S.* 
Kyriakopoulos, C.* 
Bignami, C.* 
Chini, M.* 
Melini, D.* 
Moro, M.* 
Picchiani, M.* 
Saroli, M.* 
Boschi, E.* 
TitleDid the September 2010 (Darfield) earthquake trigger the February 2011 (Christchurch) event?
Issue DateSep-2011
Series/Report no.98/1 (2011)
DOI10.1038/srep00098
URIhttp://hdl.handle.net/2122/7439
KeywordsDInSAR
Coulomb Failure
Christchurch earthquake
surface deformation
seismi source modelling
Subject Classification04. Solid Earth::04.03. Geodesy::04.03.01. Crustal deformations 
AbstractWe have investigated the possible cause-and-effect relationship due to stress transfer between two earthquakes that occurred near Christchurch, New Zealand, in September 2010 and in February 2011. The Mw 7.1 Darfield (Canterbury) event took place along a previously unrecognized fault. The Mw 6.3 Christchurch earthquake, generated by a thrust fault, occurred approximately five months later, 6 km south-east of Christchurch’s city center. We have first measured the surface displacement field to retrieve the geometries of the two seismic sources and the slip distribution. In order to assess whether the first earthquake increased the likelihood of occurrence of a second earthquake, we compute the Coulomb Failure Function (CFF). We find that the maximum CFF increase over the second fault plane is reached exactly around the hypocenter of the second earthquake. In this respect, we may conclude that the Darfield earthquake contributed to promote the rupture of the Christchurch fault.
Appears in Collections:Papers Published / Papers in press

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