{"id":874,"date":"2011-11-13T10:34:21","date_gmt":"2011-11-13T10:34:21","guid":{"rendered":"http:\/\/www.iiees.ac.ir\/en\/?p=874"},"modified":"2011-11-13T10:34:21","modified_gmt":"2011-11-13T10:34:21","slug":"study-of-the-march-25-2006-fin-earthquake-mw-59-in-hormozgan-province-based-on-aftershock-analysis","status":"publish","type":"post","link":"http:\/\/old.iiees.ac.ir\/en\/study-of-the-march-25-2006-fin-earthquake-mw-59-in-hormozgan-province-based-on-aftershock-analysis\/","title":{"rendered":"Study of the March 25, 2006 Fin Earthquake (Mw, 5.9) in Hormozgan Province Based on Aftershock Analysis"},"content":{"rendered":"
Study of the March 25, 2006 Fin Earthquake (Mw, 5.9) in Hormozgan Province Based on Aftershock Analysis<\/strong><\/div>\n

Farzam Yaminifard<\/p>\n

\u00a0<\/p>\n

Abstract<\/p>\n

In March 25th, 2006 at 7:29 (UTC)[10:59, local time], an earthquake with moment magnitude of MW=5.7 occurred in the Fin region in southeast of the Zagros Simple Fold. This earthquake has been sequenced by 4 moderate aftershocks at 9:55, 10:00, 11:02 and 12:13 UTC. The purpose of this thesis is studying the aftershocks of this earthquake, recorded by a local seismic network in the region, and finding the relation between faulting and folding in this region.<\/p>\n

Calculated velocity model for Fin region showed two discontinuities in 12 and 13 kilometer depths. P wave velocity have been obtained 5.65 km\/s, 5.9 km\/s and 6.25 km\/s for the first layer, second layer and half space, respectively. In the next step by using the obtained velocity model, we relocated the aftershocks using double difference method. Number of selected aftershocks that have been located by double difference method versus depth, indicates most earthquake depths in this region are limited in the range of 9 to 25 km.<\/p>\n

The epicentral distribution of aftershocks showed an east-west trend which indicates that the causative fault is in the east-west direction. Both focal mechanism solution reported by CMT catalog and body wave modeling results were also in agreement with it. Cross section view in north-south direction showed a northward dip for the fault plane. There is no incidence between the strike of depth distribution of aftershocks on the surface and the known folds of the region. By using these results we conclude that there is no direct relationship between depth faulting and surface folding, aftershocks were distributed lower than 5km depth which indicates that the Cretaceous Gurpi marls would not let faulting reaches to the surface.<\/p>\n

\u00a0<\/p>\n

Keywords:<\/p>\n

Zagros, Aftershocks, Fin, Folding, Seismotectonics<\/p>\n

\n

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