Near‐Surface Shear Velocities in Diverse Geological Segments of India
作者： Arun Singh , M Ravi Kumar , D Srinagesh , None
DOI: 10.1785/0120120112
关键词: Precambrian 、 Surface shear 、 Terrain 、 Seismology 、 Shear (geology) 、 Shield 、 Ultra low velocity zone 、 Hazard analysis 、 Geology
摘要: Abstract In this paper we investigate the near‐surface shear velocities beneath 144 broadband seismic stations of India that span diverse geological terrains, using nearly 37,635 good quality (SNR≥2.5) three‐component waveforms from 3849 earthquakes. The results suggest lower regions large sedimentation, with lowest in range ∼1 km/s observed for Indo‐Gangetic plains. These low velocity estimates show a dependence on frequency, implying changes depth. Segments represent Precambrian shield reveal high 3.2 to 3.4 km/s, akin global observations. mountain ranges constitute Himalaya and southern Tibet have intermediate primarily ranging 2.8 3.0 km/s. Overall, seem be correlated local geology provide inputs site‐specific hazard assessment terms predicting strong ground motions due scenario
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