• journal_title：Bulletin of the Seismological Society of America
• Contributor：Claus Milkereit ; Helmut Grosser ; Rongjiang Wang ; Hans-Ulrich Wetzel ; Heiko Woith ; Salih Karakisa ; Sami Zünbül ; Jochen Zschau
• Publisher：Seismological Society of America
• Date：2004-
• Format：text/html
• Language：en
• Identifier：10.1785/0120030194
• journal_abbrev：Bulletin of the Seismological Society of America
• issn：0037-1106
• volume：94
• issue：6
• firstpage：2400
• section：Short Notes

Aftershocks of the magnitude M_w 6.4 Bingöl earthquake of 1 May 2003 (eastern Turkey) were monitored by a local temporary seismic network. The spatial distribution of the aftershocks shows that the earthquake did not occur on the left-lateral East Anatolian fault, but perpendicular to it along a north-northwest-striking right-lateral fault. The event ruptured an area of 20 km by 8 km, but did not reach the Earth’s surface. The aftershocks of the 2003 Bingöl earthquake and those of the 1992 Erzincan earthquake seem to indicate the existence of a new seismically active right-lateral shear zone. Indeed, we show that historical earthquakes along both the North and East Anatolian fault led to positive changes in Coulomb failure stress for north-northwest-oriented right-lateral strike-slip faults in the Bingöl epicentral area. Moreover, the existence of such faults is supported by remote-sensing data.

Online material: Fault geometry and aftershock data near Bingöl.