Aftershock Analysis for the ۱۹۹۷ Ghaen-Birjand (Ardekul) Earthquake
Publish Year: 1382
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JSEE-5-2_001
تاریخ نمایه سازی: 14 آبان 1400
Abstract:
In this study at the first step, the database of two temporary networks of International Institute of Earthquake Engineering and Seismology (IIEES) and Institute of Geophysics of Tehran University (IGTU), which deployed independently after the Ghaen-Birjand earthquake, were merged. Based on the new database, focal mechanisms of some larger aftershocks were obtained and crustal model of eastern Iran [۳] modified for the epicentral area of Ghaen-Birjand earthquake and its aftershocks. The Vp/Vs ratio is inferred as ۱.۸۵ for the region covered by the temporary seismic networks. After relocation of more than two hundred events, it was cleared that at least three of the largest aftershocks were estimated to be located with a precision corresponding to error ellipsoid axes within ۵ to ۱۰ km (Ground Truth level of ۵ to ۱۰).
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Authors
Amir Mansour Farahbod
IIEES
Conrad Lindholm
Seismology Department of NORSAR
Mohammad Mokhtari
IIEES
Hilmar Bungum
Head of NORSAR Seismology Department