...D. Shashidhar; K. Mallika; Kalpna Gahalaut; C. R. Mahato; H. V. S. Satyanarayana Abstract An earthquake of M w 4.0 occurred on 3 June 2017, south of Warna Dam, in the vicinity of the Western Ghat Escarpment (WGE), India. This earthquake is associated with a foreshock–aftershock sequence of 123...

...Dodla Shashidhar; Ismael Vera Rodriguez; Kothamasu Mallika; Daniela Kühn; Matthew Wilks; Hari Venkata Subramanya Satyanarayana; Volker Oye ABSTRACT In the Koyna–Warna region, western India, an enormous number of microearthquakes was detected automatically on borehole records. Most of these events...

...Vineet K. Gahalaut; Kalpna Gahalaut; Joshi K. Catherine; K. M. Sreejith; Ritesh Agrawal; Rajeev Kumar Yadav; Ch. Mohanalakshmi; M. S. Naidu; V. Rajeshwar Rao Abstract Earthquakes in Koyna–Warna region in western India are considered to be triggered by the reservoirs. However, our understanding...

...Sunil Rohilla; M. Ravi Kumar; N. Purnachandra Rao; H. V. S. Satyanarayana Abstract The Koyna–Warna region in western India, overlain by the Deccan volcanic layer, is globally known for reservoir triggered seismicity. It is located on a high elevated plateau separated by a steep topographic...

...Sunil Rohilla; N. Purnachandra Rao; Peter Gerstoft; D. Shashidhar; H. V. S. Satyanarayana Abstract The Koyna–Warna region is a premier site of reservoir‐triggered seismicity in the Deccan volcanic province of western India. In the present study, shear‐wave velocity structure of this region down...

... (inverted triangles). The delineated seismicity clusters of zones A, B, and C used in this article are also shown. The inset shows the location of the study region in India map. Inverted triangles denote the station locations Because earthquakes have occurred near the Koyna and Warna reservoirs...

...Kalpna Gahalaut; V. K. Gahalaut; R. K. Chadha Abstract We test the hypothesis that coseismic water-level changes in wells are proportional to coseismic volumetric strain by analyzing available data from the Koyna–Warna region of western India. A total of 18 cases of water-level changes have been...

...Chandrani Singh; Pankaj Mala Bhattacharya; R. K. Chadha Abstract The Koyna–Warna region in western part of India is a unique site of reservoir-triggered seismicity where continuous seismic activity has been going on over the last 40 yr. We have analyzed the seismicity of this region in terms...

...Figure 1. A regional topography map of the Koyna–Warna region in western India, derived from the Cartosat‐1 digital elevation model (DEM). The north–south line dividing the dark and light gray shades defines the Western Ghat Escarpment (WGE). The drainage system is shown with irregular lines...

... data in the Koyna-Warna area, report South Carolina, Columbia, South Carolina, U.S.A., 109 pp. Tandon, A. N. and H. M. Chaudhury (1968). Koyna earthquake of Decem- ber 1967, India Meteorological Department, Scientific Report 59. Utsu, T. (1969). Aftershocks and earthquake statistics, I. some parameters...

... range. Spatially, the earthquakes of M -> 3 and high stress drop are now less near Koyna reservoir but frequent near the new reservoir. Introduction The Koyna-Warna area is situated in the west coast region of the Deccan volcanic province of India where extensive basic lava flows of Deccan trap...

... earthquakes using moment tensor inversion and 3 earthquakes from the first motion of P polarity. The obtained focal mechanism solutions show dominance of a strike‐slip mode of deformation in south India, except for the Koyna–Warna region, where normal‐type solutions also exist. The P‐axis trend is north–south...

... of increase in the rate of emptying of the Koyna and Warna reservoirs. Located near the west coast of India, Koyna continues to be a classical site of artificial water‐reservoir‐triggered seismicity ( RTS ). Triggered earthquakes began to occur soon after the impoundment of the Koyna Dam in 1962...

... on an active intraplate fault system at Koyna‐Warna, Western India , J. Geol. Soc. India 90 , no.  6 , 798 – 801 . Shashidhar D. Satyanarayana H. V. S. Mahato C. R. Mallika K. Rao N. P. , and Gupta H. K. 2016 . Borehole network at Koyna India , Seismol. Res. Lett. 87...

... et al. (2016) reviewed the observations from five decades of studies in the Koyna–Warna region. The state of the art in geological, geodynamical, and geophysical studies of the region is reviewed in detail by Mikhailov et al. (2017) . The Journal of the Geological Society of India has brought...

..., geochemical, isotopic, etc. precursors for this purpose. Two recent attempts toward earthquake forecasting in India's Koyna-Warna seismic area (Gupta et al. 2006 , 2007 ) using earthquake nucleation phenomena were successful. Other precursors such as soil gas radon were recently attempted in a reservoir...