The aftershock sequence of the north-west Kashmir earthquake of September 3, 1972

V. K. SRIVASTAVA, R. K. S. CHOUHAN, R. NIGAM

Abstract


This paper is an attempt to study the aftershock sequence
of the Northwest Kashmir earthquake of September 3, 1972. b value
of the sequence is 1.59. The area of active strain zone is approximately
2.9 • ]013 sq. cm. The total average strain, average elastic energy and
average stress of the rock before slip are 3.3 • 10~5, 3.2 ergs/cm3 and 19.8
kg/cm2.
The strain rebound curve of the sequence has been constructed which
shows a dual type of recovery where the compressional elastic creep is followed
by the shear creep recovery. The relaxation time of the sequence
is about 0.7 day, showing the Kelvin body like behaviour of the upper
mantle.

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References


DOI: https://doi.org/10.4401/ag-4896
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Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X