Investigating the temporal variations of the time-clustering behavior of the Koyna–Warna (India) reservoir-triggered seismicity

The time-clustering behavior of the 1996–2005 seismicity of Koyna–Warna region (India), a unique site where reservoir-triggered earthquakes have been continuously occurring over the last about 50 year, has been analyzed. The scaling exponent α, estimated by using the Allan Factor method, a powerful tool to investigate clusterization in point processes, shows co-seismic and pre-seismic enhancements associated with the occurrence of the major events.

Research highlights► Time-clustering behaviour in seismicity can be detected by applying the Allan Factor. ► The reservoir-induced seismicity at Koyna–Warna (India) is time-clusterized. ► Pre- and co-seismic increases of the time-clustering degree are revealed.