Frequency-dependent Lg attenuation in the Indian Platform

Mitra, S. and Priestley, K. F. and Gaur, V. K. and Rai, S. S. (2006) Frequency-dependent Lg attenuation in the Indian Platform. Bulletin of the Seismological Society of America, 96 (6). pp. 2449-2456. DOI 10.1785/0120050152

[img]
Preview
PDF
Priestley_BSSA_96_2006.pdf

Download (349kB) | Preview

Abstract

We use seismograms from regional earthquakes recorded on digital seismographs in peninsular India to determine the frequency-dependent Q of Lg for the Indian platform. We measure Lg attenuation by determining the decay of spectral amplitudes with distance. The available data suggest some spatial variation in attenuation but a much denser ray-path coverage would be required to validate such observations. We, therefore, combine all the measurements of overlapping regions that span both the shield and intervening terranes to obtain an average value of attenuation for the Indian platform: Lg–Q = 665 ± 10 with the frequency exponent n = 0.67 ± 0.03. This average value of Lg attenuation for the Indian platform is similar to the average for other stable regions of the globe.

Item Type: Article
Uncontrolled Keywords: 2007 AREP IA51 IA53 2006 AREP
Subjects: 02 - Geodynamics, Geophysics and Tectonics
Divisions: 02 - Geodynamics, Geophysics and Tectonics
Journal or Publication Title: Bulletin of the Seismological Society of America
Volume: 96
Page Range: pp. 2449-2456
Identification Number: 10.1785/0120050152
Depositing User: Sarah Humbert
Date Deposited: 16 Feb 2009 13:03
Last Modified: 23 Jul 2013 10:08
URI: http://eprints.esc.cam.ac.uk/id/eprint/544

Actions (login required)

View Item View Item

About cookies