Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Kagan, Y. Y. Articles by Jackson, D. D. Search for Related Content GeoRef GeoRef Citation

Worldwide doublets of large shallow earthquakes

Department of Earth and Space Sciences University of California, Los Angeles, California 90095-1567ykagan{at}ucla.edu djackson{at}ucla.edu

Abstract

We investigated all the pairs of M_w 7.5 shallow earthquakes in the Harvard catalog that occurred at a centroid distance of less than 100 km. We showed that most of these pairs have similar focal mechanisms. Because these earthquakes generally should have focal regions in excess of 100 km diameter, their rupture zones apparently intersect. For all these pairs, the time interval is significantly less than the time span needed for plate motion to accumulate the strain released by the first event. These observations conflict strongly with quasi-periodic recurrence models on which the seismic gap hypothesis is based. Power-law recurrence fits these earthquake observations much better.

This article has been cited by other articles:

				E. H. Field A Summary of Previous Working Groups on California Earthquake Probabilities Bulletin of the Seismological Society of America, August 1, 2007; 97(4): 1033 - 1053. [Abstract] [Full Text] [PDF]

				A Brownian Model for Recurrent Earthquakes Bulletin of the Seismological Society of America, August 1, 2002; 92(6): 2233 - 2250.

				Adaptive Kernel Estimation and Continuous Probability Representation of Historical Earthquake Catalogs Bulletin of the Seismological Society of America, April 1, 2002; 92(3): 904 - 912.

				Aftershock Zone Scaling Bulletin of the Seismological Society of America, March 1, 2002; 92(2): 641 - 655.

				Short-term Exciting, Long-term Correcting Models for Earthquake Catalogs Bulletin of the Seismological Society of America, August 1, 2000; 90(4): 849 - 858.