On moment-length scaling of large strike slip earthquakes and the strength of faults

Details On moment-length scaling of large strike slip earthquakes and the strength of faults On moment-length scaling of large strike slip earthquakes and the strength of faults

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29l..45r&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 12, pp. 45-1, CiteID 1604, DOI 10.1029/2001GL014479

Physics

6

Seismology: Earthquake Dynamics And Mechanics, Seismology: Earthquake Parameters, Seismology: Seismicity And Seismotectonics

Scientific paper

Several large strike slip earthquakes have occurred in various tectonic settings in the past 5 years, adding well documented data to the global collection of moment and length estimates for such earthquakes. Based on this augmented dataset, we reexamine the controversial issue of scaling of seismic moment with length of rupture. We find that the global dataset of large strike-slip earthquakes follows a bi-modal distribution. Most oceanic and/or intraplate strike-slip earthquakes have stress drops that are ~5 times larger than interplate continental ones. When distinguishing these two classes, the scaling is compatible with that predicted by simple dislocation theory.

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