Sustained Seismicity near Koyna-Warna Reservoir: A Mish-mash of Physical Processes
Authors
-
National Geophysical Research Institute, Hyderabad - 500 007
Kalpna Gahalaut -
National Centre for Seismology, Ministry of Earth Sciences, New Delhi - 110 003
Vineet K. Gahalaut
DOI:
https://doi.org/10.1007/s12594-017-0783-8Abstract
Earthquakes in Koyna-Warna region are triggered by the reservoirs but the reasons for sustained seismicity, in terms of magnitude and time, remain enigmatic. We critically review the proposed models/processes, which include fault interaction, flexure of Western Ghat escarpment, velocity heterogeneity, and earthquakes being considered as aftershocks. We suggest that each of these processes or models have limitations and are not capable of explaining all the features of seismicity individually. It is possible that all put together and some other unknown additional processes are at work and there is a mish-mash of several processes attending the region, causing continuing seismicity for past five decades.
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