Attenuation of high frequencyPandSwaves in the crust of the East-Central Iran

Autor:	G. J. Doloei, H. Hamzehloo, Majid Mahood
Rok vydání:	2009
Předmět:	Geophysics Geochemistry and Petrology Wave propagation Body waves Attenuation Upper crust Crust Frequency dependence Geodesy Seismogram Geology Seismology
Zdroj:	Geophysical Journal International. 179:1669-1678
ISSN:	1365-246X 0956-540X
Popis:	SUMMARY We simultaneously estimated Qp −1 and Qs −1 by applying the extended coda-normalization method at 39 stations of three local networks in the East-Central Iran. We measured frequencydependent attenuation of both P and S waves for the frequency range of 1.5, 3.0, 6.0, 12 and 24 Hz. We have analysed 266 three-component seismograms of 53 local earthquakes, having focal depths less than 25 km, which occurred from 2003 December 28 to 2005 April 11. By fitting power-law frequency dependence to the estimated values over the whole stations, we obtained Qp −1 = (25 ± 3) × 10 −3 f (–0.99±0.04) and Qs −1 = (19 ± 2) × 10 −3 f (–1.02±0.06) in the upper crust of the East-Central Iran, where f is frequency in Hz. Our results are in the range of those estimated for Qp −1 and Qs −1 of the other seismically active regions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::17b501a840bced73ddbdcb0ef5e3f555 https://doi.org/10.1111/j.1365-246x.2009.04363.x Zobrazit plný text záznamu Plný text