Crustal velocity and interseismic strain-rate on possible zones for large earthquakes in the Garhwal-Kumaun Himalaya.

ABSTRACT: The possibility of a major earthquake like 2015 Gorkha-Nepal or even greater is anticipated in the Garhwal-Kumaun region in the Central Seismic Gap of the NW Himalaya. The interseismic strain-rate from GPS derived crustal velocities show multifaceted strain-rate pattern in the region and are classified into four different strain-rate zones. Besides compressional, we identified two NE-SW orienting low strain rate (~ 20 nstrain/a) zones; namely, the Ramganga-Baijro and the Nainital-Almora, where large earthquakes can occur. These zones have surface locking widths of ~ 72 and ~ 75 km respectively from the Frontal to the Outer Lesser Himalaya, where no significant surface rupture and associated large earthquakes were observed for the last 100 years. However, strain reducing extensional deforma

SUBMITTER: Pappachen JP 

PROVIDER: S-EPMC8553753 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature