TEMPORAL VARIATION OF VP / VS AS A PREQURSORY IN AUGUST 11 , 2012 AHAR – VARZAQHAN EARTHQUAKE
Publish Year: 1394
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
SEE07_320
تاریخ نمایه سازی: 29 آذر 1399
Abstract:
On August 11, 2012, two earthquakes of Mw = 6.5 and Mw = 6.3 took place in part of the Western Alborz seismotectonic province, Ahar-Varzaqhan region.We processed the phase data recorded in 8 seismic stations during 2006-2012 using Wadati method. Temporal variations of Vp/Vs were studied as a tool in earthquake precursory researches in these earthquakes. We impose a number of restrictions on the computation. The number of stations involved in this process is more than 3 and recorded earthquakes withM ≥ Mc. Under these restrictions, the study shows that Vp/Vs in and around Ahar-Varzaqhan study area normal-low-normal process a few months before main shock occurrence
Keywords:
Ahar-Varzaghan Earthquake , Ratio of Shear and Compressional Wave Velocities , Earthquake Prediction
Authors
Zari BORDBAR
Expert, Institute of Geophysics, University of Tehran, Tehran, Iran
Mohammad Reza HATAMI
Assistant Professor, Institute of Geophysics, University of Tehran, Tehran, Iran
Amin ABBASI
Researcher, Institute of Geophysics, University of Tehran, Tehran, Iran