Journal article
Fault damage zones of the M7.1 Darfield and M6.3 Christchurch earthquakes characterized by fault-zone trapped waves
YG Li, GP De Pascale, MC Quigley, DM Gravley
Tectonophysics | Published : 2014
Abstract
To characterize the subsurface structure of the damage zones caused by the 2010-2011 Canterbury earthquake sequence in New Zealand's South Island, we installed two short linear seismic arrays; Array 1 across the Greendale Fault (GF) surface rupture and Array 2 over the surface projection of the blind Port Hills Fault (PHF) that ruptured in the 2010. M7.1 Darfield and 2011. M6.3 Christchurch earthquakes, respectively. We recorded 853 aftershocks for ~. 4. months after the Christchurch earthquake. Fault-zone trapped waves (FZTWs) identified at Array 1 for aftershocks occurring on both the GF and the PHF show that the post-S durations of these FZTWs increase as focal depths and epicentral dista..
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Awarded by National Science Foundation
Funding Acknowledgements
This material is based upon work supported by the National Science Foundation under Grants EAR-1142071 and EAR-1137632, and the Southern California Earthquake Center (contribution number 1764). We are grateful to Reviewer M. Savage for her helpful comments to this manuscript and P. Malin, C. Thurber, H. Cowan, K. Berryman, T. Jordan, J. Pettinga, and J. McRaney for their helpful discussions about our experiment in the Canterbury Plains in NZ South Island. Thanks to Matt Cockcroft for equipment support at the University of Canterbury. We acknowledge the IRIS for the use of PASSCAL instruments in our RAMP experiment in New Zealand. Thanks to J. Cherrington and M. Alvarez for their participation in early deployment of seismographs in the field. Special thanks to the local landowners in Canterbury for allowing us to install seismic stations on their land.