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Jammu and Kashmir Seismological NETwork (JAKSNET) earthquake catalogue (2014-2017)

Mitra, Supriyo1; Wanchoo, Sunil2; Priestley, Keith3

Published Aug 27, 2024 on Dryad. https://doi.org/10.5061/dryad.gmsbcc2x2

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Aug 27, 2024 version files 329.02 KB

Abstract

In the NW Himalaya, the region between the 1905 Kangra and 2005 Kashmir earthquake rupture zones is known as the Kashmir 'seismic gap'. We established the Jammu and Kashmir seismological NETwork (JAKSNET) in 2013 to study the seismicity in this 'gap'. Continuous ground-motion data from JAKSNET between 2014 and 2017 has been used to detect and locate 1064 events. This is followed by accurate P- and S-wave phase arrival-time picking and relocation using a probabilistic non-linear location method. These yielded 360 well-located local earthquakes have magnitudes of 0.6--4.7 and source depths of 0-60~km. This dataset consists of (a) the phase arrival-times of these local earthquakes and (b) the earthquake location catalogue. 

The majority of these earthquakes are shallower than 20~km and are clustered beneath the Jammu-Kishtwar Higher-Himalaya. They originated on or above the Main Himalayan Thrust (MHT), a fault zone which separates the underthrusting Indian crust from the overriding Himalaya. The distribution of the clustered seismicity illuminates structural heterogeneities on the MHT, which could influence rupture initiation and propagation of future large earthquakes.