Publication Date:
2011-10-01
Description:
We compile a data set of 585 weak, broadband, and strong ground-motion recordings from 184 earthquakes covering hypocentral distances ranging from 9 to 436 km in northeast India and the northwest Himalayas. Source-normalized vertical-component Fourier amplitude S-wave spectra are used to study path-attenuation characteristics, namely, geometrical spreading and quality factor, in the two regions. A trilinear model of geometrical spreading of R-1.0 for hypocentral distance R 140 km approximates the decay of low-frequency (1.0 Hz) amplitudes in northeastern India better than the conventional theoretical bilinear geometrical spreading of R-1.0 for R
Print ISSN:
0037-1106
Electronic ISSN:
1943-3573
Topics:
Geosciences
,
Physics
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