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Earthquake scenario in West Bengal with emphasis on seismic hazard microzonation of the city of Kolkata, India

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Figure

Figure 1. A microzonation framework for site-specific seismic hazard assessment.
Figure 2. (a) Seismotectonic system of West Bengal and its adjoining region (lat 19.6 to 28.3◦ N, long 85.4 to 92.9◦ E) (modified consideringDasgupta et al., 2000; USGS-BGAT, 2001; and GSB, 1990) and (b) a W–E geological cross section depicting the lithostratigraphy andstructural setting of the Bengal Basin (modified from Alam et al., 2003).
Table 1. A list of major active tectonics which are considered to be seismic sources, along with total fault length (TFL), observed maximumearthquake (Mmax,obs), subsurface rupture length (RLD), and estimated maximum earthquake (Mmax) in Kolkata and adjoining regions.
Table 2. Estimated seismicity parameters for all the polygonal seismogenic sources considered for PSHA in Kolkata.
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