HR: 17:30h
AN: S54A-07    [Abstracts]
TI: Earthquake Relocations and Moment-tensor Solutions in Western Turkey from the 2003 Seismic Recording Experiment
AU: * Zhu, L
EM: lupei@eas.slu.edu
AF: Department of Earth and Atmospheric Sciences, Saint Louis University, 3507 Laclede Ave, St Louis, MO 63103 United States
AU: Akyol, N
EM: nihal.akyol@deu.edu.tr
AF: Department of Geophysics, Dokuz Eylul University, Izmir, Turkey, Kaynaklar Campus, Izmir, 000 Turkey
AU: Mitchell, B J
EM: bjmitch@eas.slu.edu
AF: Department of Earth and Atmospheric Sciences, Saint Louis University, 3507 Laclede Ave, St Louis, MO 63103 United States
AB: Western Turkey is one of the most seismically active continental regions in the world and much of it is undergoing extensive north-south extensional deformation. In a cooperative study, seismologists from Saint Louis University and Dokuz Eylul University in Izmir, Turkey, deployed 5 broadband and 45 short-period seismic stations in western Anatolia between November 2002 and October 2003. 41 short-period stations were located along a 100-km-long NS profile in the central portion of the zone of extension (the central Menderes Massif). The remaining instruments were deployed as a regional array distributed throughout the region. We used the double-difference (DD) method to relocate local earthquakes in the Kandilli Observatory catalog. More than 45000 P and S differential travel-times were obtained, mostly by waveform cross-correlation using 14 array stations and 5 permanent Turkish station in the region. In total were able to relocate 364 earthquakes among 531 earthquakes in the catalog. Their relocations are highly concentrated in several clusters and reveal linear feature in seismicity. We also determined double-couple moment-tensors of 84 earthquakes with magnitudes larger than 3. All of them show either strike-slip or normal faulting with near-horizontal T-axes (extensional axes) in the NS direction.
DE: 7230 Seismicity and seismotectonics
DE: 8107 Continental neotectonics
DE: 8109 Continental tectonics--extensional (0905)
DE: 7215 Earthquake parameters
SC: Seismology [S]
MN: 2004 AGU Fall Meeting