Aftershocks of the March 1999 Chamoli Earthquake and Seismotectonic Structure of the Garhwal Himalaya

2003/02/01 by J. R. Kayal · 4 citations
Earth and Planetary Sciences · #earthquake and tectonic studies #Earthquake Detection and Analysis #Geological and Geochemical Analysis

paper · doi:10.1785/0119990139

Abstract

The aftershocks of the Chamoli earthquake ( m b 6.3) of 28 March 1999 are analyzed to understand the seismotectonic structure of the Garhwal Himalaya. The permanent as well as temporary microearthquake network data are used. The mainshock occurred on the Basement Thrust by thrust faulting. The aftershocks, on the other hand, are triggered at the seismogenic faults to the south of the Main Central Thrust (MCT) by thrust faulting as well as by strike-slip faulting, and all the events occurred above the plane of detachment/basement thrust. The MCT is not the seismogenic fault.

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• Seismotectonics and crustal stress field in the Kumaon–Garhwal Himalaya
• Crustal velocity structure and earthquake processes of Garhwal-Kumaun Himalaya: Constraints from regional waveform inversion and array beam modeling

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