Physics
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pepi...44...73p&link_type=abstract
Physics of the Earth and Planetary Interiors, Volume 44, Issue 2, p. 73-81.
Physics
1
Scientific paper
The township of Khardi, located 7 km northwest of the Bhatsa dam, in the western part of the Deccan Volcanic Province, was subjected to earthquakes of magnitudes 4.0 and 4.8 on August 17, 1983 and September 15, 1983, respectively. The Khardi-Bhatsa area is located to the east of the Panvel flexure axis and on a northwest-southeast trending belt, forming an extension of the Ghod lineament of the Deccan Plateau. The earth tremors at Khardi followed impoundment of water, during June-July 1983, behind the recently constructed Bhatsa dam, and the rise in lake-level from about 92 to 110 m above MSL. It is suggested that percolation of water during this period along fractures led to a build-up of pore-fluid pressure which was transmitted down to a stress zone with a potential to slip. Consequent reduction in effective stress (tectonic stress-pore fluid pressure) induced the earthquakes. Available seismic data for the Khardi-Bhatsa area suggest that b-values can also be used as a `short term' precursor for detecting impending, strong reservoir-induced earth tremors in the area.
Bhosale V. N.
Guha S. K.
Patil D. N.
Powar K. B.
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