Lateral variation and frequency dependence of coda-Q in the southern part of Iberia期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Lateral variation and frequency dependence of coda-Q in the southern part of Iberia

Authors:	José A Canas Lluis Pujades José Badal Gonzalo Payo Fernando de Miguel Francisco Vidal Gerardo Alguacil Jesús Ibañez José Morales

Institution:	Escuela Técnica Superior de Ingenieros de Caminos, Canales y Puertos, Universidad Politécnica de Catalunya, 08034;Barcelona, Spain Departamento de Física Teórica, Universidad de Zaragoza, 50009;Zaragoza, Spain Observatorio Geofísico de Toledo, Instituto Geográfico Nacional, 45071;Toledo, Spain Observatorio Universitario de Cartuja, Universidad de Granada, 18071;Granada, Spain

Abstract:	b A method based on the coda attenuation law: Q = Q ₀( f/f ₀)^v leads to the determination of the lateral variation of coda- Q in the southern part of the Iberian Peninsula using seismograms belonging to the seismological network of the Cartuja Observatory, located in Granada. The lateral variation of Q ₀ ( Q value corresponding to a reference frequency f ₀ of 1 Hz) and its frequency dependence for the 1 to 5 Hz frequency range are, in general, in agreement with coda- Q values for frequencies less than about 1 Hz, previously determined in the region under study. To determine the coda- Q values analytical functions have been used to fit the magnification curves of the vertical component short-period seismographs belonging to the Cartuja network. The problem is solved by using least-squares techniques and non-linear inversion. The determined coda- Q ₀ values and its frequency dependence correlate well with several known geophysical parameters in the southern part of the Iberian Peninsula.

Keywords:	coda-Q lateral variation southern Iberian Peninsula

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