Intra-Crustal Seismicity Triggering in Shillong Massif – An Appraisal on Recent Seismicity

Shillong plateau in the North East India resembles a kind of inselberg, confined between great Hilamalayan mountain belts north and Arakan-Yoma towards east. The study area is governed by system complex seismotectonic features responsible for intense seismicity region, significantly devastation aftermath 1897 Assam Earthquake (Ms~8.7). Spatio-temporal distribution triggering inside from 1966 to 2013 suggests distinctly variable depth-ranges zones within crust. depth section counterparts monitoring its periphery infers bottom seismogenic zone lie at ~40km with an average earthquake occurrence 22.31km; besides, also dictates dominant magnitude as ≤4.99Mw, wherein most earthquakes are 3-5 Mw 3.42 MW. reveals seismic activity central western part owing conjecture number active faults. present incorporates both qualitative well quantitative approach while understanding types recent pattern massif.