Sentences with phrase «mainshock areas»
«Although the simulated earthquake - induced tsunamis are not small, there has been a recorded history of significantly larger events, in terms of earthquake magnitude and mainshock areas, taking place in the region,» says Samaras.
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«This was an event the thrust interface of the plate boundary system, confirming that there is a subduction system in the Haida Gwaii area,» said Honn Kao, seismologist with the Geological Survey of Canada, who, along with his colleagues, examined the source parameters — causative faults, rupture processes and depths — of the mainshock and sequence of strong aftershocks.
A close study of the Haida Gwaii mainshock by Kao et al. revealed the Pacific plate slid at a low angle below the North American plate on a previously suspected thrust fault, confirming the presence of subduction activity in the area.
Colin Pennington and Xiaowei Chen of the University of Oklahoma investigated stress interactions between the main faults in the area, concluding that the three Pawnee foreshocks promoted the failure of the fault for the Pawnee mainshock and early aftershock, and that the mainshock led to the fault failure behind further aftershocks.