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- W2803208113 abstract "Seismic source parameters of small to moderate sized intraplate earthquakes that occurred during 2002–2009 in the tectonic blocks of Kachchh Rift Basin (KRB) and the Saurashtra Horst (SH), in the stable continental region of western peninsular India, are studied through spectral analysis of shear waves. The data of aftershock sequence of the 2001 Bhuj earthquake ( $$M_{w}$$ 7.7) in the KRB and the 2007 Talala earthquake ( $$M_{w}$$ 5.0) in the SH are used for this study. In the SH, the seismic moment ( $$M_{o})$$ , corner frequency $$(f_{c})$$ , stress drop ( $$varDelta sigma $$ ) and source radius (r) vary from $$7.8times 10^{11}$$ to $$4.0times $$ 10 $$^{16}$$ N-m, 1.0–8.9 Hz, 4.8–10.2 MPa and 195–1480 m, respectively. While in the KRB, these parameters vary from $$M_{o} sim 1.24 ,times , 10^{11}$$ to $$4.1 times 10^{16}$$ N-m, $$f_{c }sim $$ 1.6 to 13.1 Hz, $$varDelta sigma sim 0.06$$ to 16.62 MPa and $$r sim 100$$ to 840 m. The kappa (K) value in the KRB (0.025–0.03) is slightly larger than that in the SH region (0.02), probably due to thick sedimentary layers. The estimated stress drops of earthquakes in the KRB are relatively higher than those in SH, due to large crustal stress concentration associated with mafic/ultramafic rocks at the hypocentral depths. The results also suggest that the stress drop value of intraplate earthquakes is larger than the interplate earthquakes. In addition, it is observed that the strike-slip events in the SH have lower stress drops, compared to the thrust and strike-slip events." @default.
- W2803208113 created "2018-06-01" @default.
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- W2803208113 date "2018-05-23" @default.
- W2803208113 modified "2023-10-18" @default.
- W2803208113 title "Comparison of earthquake source characteristics in the Kachchh Rift Basin and Saurashtra horst, Deccan Volcanic Province, western India" @default.
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- W2803208113 doi "https://doi.org/10.1007/s12040-018-0957-9" @default.
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