Jammu and Kashmir Seismological NETwork (JAKSNET) earthquake catalogue (2014-2017)
Data files
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.
README
This database consists of two files:
- NLL_Input-Time-Picks-2015-2017.xlsx
This contains P- and S-wave arrival times for the earthquakes at multiple stations. This has been used as an input for the relocation.
Format:
STA P/S yearmmdd hrmn sec Type Delta-t
Station P-wave Year Hour Second GAU Arrival-time
Name S-wave Month Min Gaussian Uncertainty
Date
e.g.
AKNR P 20150106 1217 42.661 GAU 0.01
AKNR S 20150106 1217 54.5882 GAU 0.05
BADR P 20150106 1217 56.1279 GAU 0.01
BADR S 20150106 1218 16.492 GAU 0.05
The station locations are avaialble in:
Swati Sharma, Supriyo Mitra, Shubham Sharma, Keith Priestley, Sunil K. Wanchoo, Debarchan Powali, Liyaqet Ali (2020) A Report on Broadband Seismological Experiment in the Jammu and Kashmir Himalaya (JAKSNET), Seismological Research Letters, 91 (3), 1915-1926, 18 March 2020. https://doi.org/10.1785/0220190389 (opens in new window)
- NLL-360-events.xlsx
This is the earthquake catalogue file.
Format:
Origin Time Latitude Longitude Depth Magnitude ID Xerr Yerr Zerr No. of No. of
Year Month Date Hour Minute Second (degree) (degree) (km) (km) (km) (km) Phase Stations
e.g.
2017 9 21 22 55 5.3 33.81748 74.84783 2.3 1.9 2017264225505 1.6 2.1 8.9 12 8
2017 8 24 22 11 18.6 33.8083 74.92193 0.1 2 2017236221118 1.7 1.3 9 15 8
Methods
These are phase arrival times of earthquake recorded by seismograph systems. These have been picked from the waveform data.
Works referencing this dataset
- Shamim, Sk et al. (2023), Detection and (re)location of earthquakes using Jammu And Kashmir Seismological NETwork, [], Posted-content, https://doi.org/10.5194/egusphere-egu23-12729