Mathematics – Logic
Scientific paper
Sep 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.1971p&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 18, p. 1971-1974
Mathematics
Logic
11
Crustal Fractures, Earthquakes, Plates (Tectonics), Seismology, Turkey, Geological Faults, Geomorphology, Seismic Waves, Temporal Distribution
Scientific paper
The 13 March 1992 Erzincan earthquake is different from the previous earthquakes which have occured along the North Anatolian fault zone (NAFZ) in that no surface rupture was observed. In order to infer a rupture process of this earthquake, we inverted the teleseismic body waves to the source using the method of Kikuchi and Kanamori (1991). Three different subevents were then distinguished with total seismic moment of M(sub O) = 1.2 x 10(exp 26) dyn cm. The major energy release was found to be during the first subevent with seismic moment of M(sub O) = 9.4 x 10(exp 25) dyn cm, rupture length of 30 km, slip amount of 0.7 m and stress drop of 25 bars. The second subevent was right-lateral, as was the case for the first one, with a normal faulting component. It was located 10 km to the southeast from the first one at the intersection of the right-lateral NAFZ with the left-lateral Ovacik fault. The third subevent with a right-lateral mechanism was 10 km to the southeast from the second one. These results are in good harmony with regional seismotectonics in eastern Turkey.
Honkura Yoshimori
Kikuchi Macoto
Pinar Ali
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