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Rupture process of the Mw = 7.4 Izmit, Turkey earthquake by joint inversion of InSAR and teleseismic data



Rupture process of the Mw = 7.4 Izmit, Turkey earthquake by joint inversion of InSAR and teleseismic data



Pages 99-103 2000



The rupture process of the Izmit earthquake is investigated by jointly inverting InSAR and teleseismic data with a multi-segment, variable-slip, finite fault model. Surface offsets are used as an added constraint. The highest slip values (5 to 7 m of right-lateral displacement) are found to define a 30X15 km central asperity surrounding the hypocenter. The bilateral breaking of this main asperity, which lasted about 10 sec, dominates the source time function. From the Golcuk-Izmit area to Lake Sapanca, a good correspondence is observed between slip at depth and at the surface, but farther to the West and to the East slip was confined essentially to the near surface. Slip in the easternmost part of the rupture (Duzce segment) is not well resolved.

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Accession: 019943019

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