Calculating regional stresses for northern Canterbury: the effect of the 2010 Darfield earthquake

We model regional stresses before and after the M w 7.1 Darfield earthquake of September 2010 in Canterbury, New Zealand including crustal structure derived from seismic tomography. Models show that the Banks Peninsula volcanic assemblage acts as a strong, rigid block that pinches out ductile layers...

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Bibliographic Details
Published in:New Zealand journal of geology and geophysics 2016-01, Vol.59 (1), p.202-212
Main Authors: Ellis, S, Williams, C, Ristau, J, Reyners, M, Eberhart-Phillips, D, Wallace, LM
Format: Article
Language:English
Subjects:
Darfield earthquake
New Zealand
seismology
stress
tectonics
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Summary:We model regional stresses before and after the M w 7.1 Darfield earthquake of September 2010 in Canterbury, New Zealand including crustal structure derived from seismic tomography. Models show that the Banks Peninsula volcanic assemblage acts as a strong, rigid block that pinches out ductile layers in the mid-crust but has little effect on shallower principal stress orientations. Static stress changes from the Darfield earthquake are everywhere
ISSN:0028-8306
1175-8791
DOI:10.1080/00288306.2015.1123740