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- W4318256281 abstract "Empirical relations have been found out to describe the decay in amplitude with distance of s-waves in the region of Garhwal Himalaya. These functions results from the analysis of spectral amplitudes of three component digital records from 19 local earthquakes obtained from 12-station seismological network deployed in the Garhwal lesser Himalaya. The events lie in a magnitude range from ML 2 to ML 4.5, epi-central distance 5 km to 120 km and focal depth from 5 km to 50 km. To determine the variations of the quality factor Qin the direction of wave propagation (Q anisotropy), independent estimates have been made of the attenuation of SV- and SH-waves using vertically polarized and transversely polarized components, respectively. Frequency analyzed (1-12 Hz) and in the whole distance range, the frequency dependence of Q can be approximated as Qsh = 74.3 f 1.0 for the SH-wave and Qsv = 81.5 f 0.95 for the SV-waves. The small difference between SH and SV spectral decay, suggests that Q anisotropy is negligible. However, In the distance range of 5-50 km, Qsv tends to be significantly greater than Qsh at frequency > 8 Hz. So in this distance range we observed Q anisotropy in the studied region. The dependence of Q value with frequency in this range is Qsh = 110 f 0.94 for SH- wave and Qsv = 134 f1.0 for SV-waves." @default.
- W4318256281 created "2023-01-28" @default.
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- W4318256281 date "2016-01-01" @default.
- W4318256281 modified "2023-10-18" @default.
- W4318256281 title "Q Anisotropy in the region of Garhwal Himalaya" @default.
- W4318256281 doi "https://doi.org/10.51976/ijari.441608" @default.
- W4318256281 hasPublicationYear "2016" @default.
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