Magnitude 6.1 - WESTERN IRAN
2006 March 31 01:17:01 UTC
- This event has been reviewed by a seismologist.
|Depth||7 km (4.3 miles) set by location program|
|Distances||45 km (25 miles) ENE of Khorramabad, Iran|
100 km (65 miles) WSW of Arak, Iran
135 km (85 miles) S of Hamadan, Iran
335 km (210 miles) SW of TEHRAN, Iran
|Location Uncertainty||horizontal +/- 4.7 km (2.9 miles); depth fixed by location program|
|Parameters||NST=125, Nph=125, Dmin=368 km, Rmss=0.9 sec, Gp= 32°,|
M-type=teleseismic moment magnitude (Mw), Version=Q
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At least 70 people were killed and over 1300 people were injured. 40 villages were completely destroyed in Borujerd. Many buildings damaged or destroyed in the Borujerd-Dorud area of Lorestan province. Felt (IV) at Hamadan.
This earthquake occurred as the result of stresses generated by the motion of the Arabian plate northward against the Eurasian plate at a rate of 2 to 3 cm/year (about one inch per year). Deformation of the Earth's crust in response to the plate motion takes place in a broad zone that spans the entire width of Iran and extends into Turkmenistan. Earthquakes occur primarily as the result of reverse faulting and strike-slip faulting within the zone of deformation. The March 31 earthquake occurred close to the Main Recent Fault, a major strike-slip fault, but we do not know at present if the earthquake occurred on that fault or on a related smaller fault.
The section of the Main Recent Fault near the epicenter of the March 31 earthquake produced a magnitude 7.4 earthquake in 1909.
Scientific & Technical Information
- Preliminary Earthquake Report
- U.S. Geological Survey, National Earthquake Information Center:
World Data Center for Seismology, Denver