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International Journal of Scientific and Research Publications, Volume 3, Issue 2, February 2013 820
ISSN 2250-3153
Table 15: Showing Location of Earthquakes and source parameters of the events recorded by the Jammu University Seismic Network
during January-May, 2012
S.No Date
yyyymmdd
UTC Time
HH:MM:SS.s
Latitude Longitude Coda
Magnitude
Seismic
Moment M o
(dyne-cm)
Stress
Drop
(bars) σ
Source
Radius
(km)
1 20120104 16:31:18.54 33.593 74.759 3.7 4.47x10 21 28.4 1.21
2 20120206 00:16:49.18 33.118 76.123 2.1 5.01x10 19 0.5 0.504
3 20120221 19:55:48.20 35.354 74.003 2.9 2.82x10 20 4.2 0.5842
4 20120225 21:41:18.27 32.966 76.200 1.7 4.47x10 18 0.31 0.5
5 20120307 13:18:18.73 32.518 78.332 3.8 6.31x10 21 7.0 2.08
6 20120402 06:30:17.42 32.260 74.242 2.4 5.01x10 19 1.1 0.8
7 20120405 22:34:56.02 34.920 74.447 3.0 3.98x10 20 3.8 0.6
8 20120406 10:54:48.08 32.502 76.464 2.6 1.0x10 20 1.5 0.8
9 20120424 01:52:48.74 33.898 76.482 2.3 3.55x10 19 2.5 0.5
10 20120426 22:34:01.69 32.704 76.235 2.0 1.26x10 19 0.08 0.5
11 20120501 21:36:26.76 35.144 74.396 3.0 3.98x10 20 4.61 0.456
12 20120503 14:44:56.99 33.349 75.851 2.2 2.51x10 19 0.18 0.5
13 20120506 05:43:3.43 32.650 76.337 2.5 7.08x10 19 1.5 0.5
14 20120510 01:05:20.10 33.315 74.317 2.1 1.78x10 19 0.12 0.5
The estimated seismic moment ranges from 4.47x10 18 to 6.31x10 21 dyne-cm and coda magnitudes of these events ranges from 1.7 to
3.8. The corner frequencies range from 0.63 Hz to 3.0Hz, and source radii calculated for these events ranges from 0.45 to 2.08 km.
The stress drop of these events varies from 0.08 to 28.4 bars. These results are similar to the results obtained through earlier studies
elsewhere in the Himalayan region 20, 27 .
V. CONCLUSION
The estimated source parameters for the fourteen local events (1.7≤M D ≤3.8) recorded by the four seismic observatories
installed in Jammu and Kashmir is the first such study carried out in the region. These source parameters have an importance in
providing basic information for the assessment of seismic hazard in the region which experienced an earthquake of M w =7.6 in 2005
taking a toll of about 87000 lives across the Line of actual Control in Jammu and Kashmir and Pakistan. Epicentres of these events
located north of Panjal Thrust (PT) and Main Boundary Thrust (MBT). The seismic moments calculated for these events range from
4.47x10 18 to 6.31x10 21 dyne-cm; source radii from 0.45 to 2.08 km and stress drops from 0.08 to 28.4 bars which are similar to the
events recorded in other parts of the Himalayan regions.
Govt. of India.
ACKNOWLEDGEMENTS
The authors gratefully acknowledge funding of the research project by Seismology Division, Ministry of Earth Sciences,
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