EarthRef.org Reference Database (ERR)
Development and Maintenance by the EarthRef.org Database Team

Detailed Reference Information
Park & Mori 2007
Park, S. and Mori, J. (2007). Are asperity patterns persistent? Implication from large earthquakes in Papua New Guinea. Journal of Geophysical Research 112: doi: 10.1029/2006JB004481. issn: 0148-0227.

We studied the distribution of asperities for large recent earthquakes along the New Britain trench, Papua New Guinea, to investigate if they are the same for repeated ruptures of the subduction boundary. We determined the slip distributions of two earthquakes (Mw ~ 8) in 1971 using Pdiff waveforms, and an earthquake (Mw 7.9) in 1995 using direct teleseismic P waves. Combining these findings with previous results for two earthquakes (Mw ~ 7.5) in 2000, we compared the source areas and asperity distributions for this region of the New Britain Trench. Our results show that the locations of the asperities for the individual earthquakes did not significantly overlap, although the same portion of the subduction zone seems to have reruptured. This fact supports the idea that asperities are not persistent features when portions of the New Britain subduction zone slip in large earthquakes.

BACKGROUND DATA FILES

Abstract

Keywords
Seismology, Earthquake dynamics, Seismology, Earthquake source observations, Seismology, Subduction zones (1207, 1219, 1240)
Journal
Journal of Geophysical Research
http://www.agu.org/journals/jb/
Publisher
American Geophysical Union
2000 Florida Avenue N.W.
Washington, D.C. 20009-1277
USA
1-202-462-6900
1-202-328-0566
service@agu.org
Click to clear formClick to return to previous pageClick to submit