How fast is rupture during an earthquake? New insights from the 1999 Turkey earthquakes

Details How fast is rupture during an earthquake? New insights from the 1999 Turkey earthquakes How fast is rupture during an earthquake? New insights from the 1999 Turkey earthquakes

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.2723b&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 14, p. 2723-2726

Physics

44

Seismology: Earthquake Dynamics And Mechanics, Seismology: Earthquake Ground Motions And Engineering, Seismology: Earthquake Parameters

Scientific paper

We report that during the two devastating 1999 earthquakes in Turkey, rupture propagated over a large part of the nearly 200km long fault zone at supershear speed approaching 5 km/s. We present observations and modeling which confirm the original inference of supers-hear rupture during the Izmit earthquake and we show that supershear rupture also occurred during the Düzce earthquake. We show that the rupture velocity measured-about √2 times the shear wave velocity-is the value predicted by theoretical studies in fracture dynamics. We look for clues to explain these observations.

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