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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/21985
Title: Estimation of coda wave attenuation in Alborz region and Central Iran
Authors: Rahimi H.
Motaghi K.
Mukhopadhyay, Sagarika
Hamzehloo H.
Published in: 72nd European Association of Geoscientists and Engineers Conference and Exhibition 2010: A New Spring for Geoscience. Incorporating SPE EUROPEC 2010
Abstract: More than 340 earthquakes recorded by 1GUT (Institute of Geophysics, University of Tehran) short period stations from 1996 to 2004 were analyzed to estimate the S-coda attenuation in Alborz region, the northern part of the Alpine-Himalayan orogen in western Asia, and in Central Iran which is the foreland of this orogen. Two anomalous high attenuation areas in Central Iran are recognized around the stations LAS and RAZ. The average frequency relation for Central Iran excluding the values of these two stations is Qc=94 ±2 f 0.97±0.12. To investigate the attenuation variation with depth, Qc value was calculated for fourteen lapse times for two datasets having epicentral distance range in each area. It is observed that Qc increases with depth. However, the rate of increase of Qc with depth is not uniform in our study area. Beneath Central Iran rate of increase of Qc is greater at depths less than 100 km compared to that at larger depths indicating the existence of a high attenuation anomalous structure under lithosphere of Central Iran. In addition, below ∼180 km, the Qc value does not vary much with depth under both study areas indicating presence of a transparent mantle under them. © 2010, European Association of Geoscientists and Engineers.
Citation: 72nd European Association of Geoscientists and Engineers Conference and Exhibition 2010: A New Spring for Geoscience. Incorporating SPE EUROPEC 2010 (2010), 7: 4782-4785
URI: https://doi.org/10.3997/2214-4609.201401227
http://repository.iitr.ac.in/handle/123456789/21985
Issue Date: 2010
Publisher: Society of Petroleum Engineers
Keywords: Average frequency
Central iran
Epicentral distances
Himalayan orogen
Rate of increase
Short periods
Study areas
University of Tehran
Earthquakes
ISBN: 9.78162E+12
Author Scopus IDs: 26538206300
57441580900
35617607600
55940598900
Author Affiliations: Rahimi, H., IIEES, Iran
Motaghi, K., IIEES, Iran
Mukhopadhyay, S., Department of Earth Sciences, IIT Roorkee, India
Hamzehloo, H., IIEES, Iran
Corresponding Author: Rahimi, H.; IIEESIran
Appears in Collections:Conference Publications [ES]

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