Artificial Water Reservoir Triggered Seismicity
Focus on Koyna, India
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Beschreibung
The fact that filling of an artificial water reservoir could alter the earthquake occurrence in the vicinity of a reservoir was scientifically established way back in 1939 when enhanced earthquake occurrence in the vicinity of Lake Mead, Colorado, USA was related with the filling of the Hoover Dam. Over the years artificial water reservoir triggered earthquakes have been reported from all over the world. At least at 5 sites earthquakes exceeding magnitude 6 have occurred, causing loss of human lives and substantial damage to properties and infrastructure. Globally, certain anthropogenic activities lead to inducing/triggering of earthquakes. Among these, the reservoir triggered seismicity (RTS) is most prominent. At several locations, construction of artificial water reservoirs, enhanced oil recovery through fluid injection, geothermal power production etc. had to be given up due to realization of the possibility of triggering/inducing earthquakes. The book provides an overview of all RTS sites and earthquake occurrence. RTS is found to have characteristics different from the normal earthquake sequences occurring in the nearby region of RTS sites. The book deals with the RTS mechanism, how to find safer sites for construction of artificial water reservoir and related issues. Among all the RTS sites, Koyna, India is most prominent where the largest RTS event of magnitude 6.3 occurred in 1967 and RTS has continued till now. A detailed description of the studies conducted at Koyna, India including setting up a bore-hole observatory for near-field study of earthquakes is provided. It is shown that the important question as to how earthquakes nucleate could be found from studies at Koyna, India and RTS sites elsewhere in the world. The book also provides an overview of the injection induced earthquakes occurring in Oklahoma, USA.
The fact that filling of an artificial water reservoir could alter the earthquake occurrence in the vicinity of a reservoir was scientifically established way back in 1939 when enhanced earthquake occurrence in the vicinity of Lake Mead, Colorado, USA was related with the filling of the Hoover Dam. Over the years artificial water reservoir triggered earthquakes have been reported from all over the world. At least at 5 sites earthquakes exceeding magnitude 6 have occurred, causing loss of human lives and substantial damage to properties and infrastructure. Globally, certain anthropogenic activities lead to inducing/triggering of earthquakes. Among these, the reservoir triggered seismicity (RTS) is most prominent. At several locations, construction of artificial water reservoirs, enhanced oil recovery through fluid injection, geothermal power production etc. had to be given up due to realization of the possibility of triggering/inducing earthquakes. The book provides an overview of all RTS sites and earthquake occurrence. RTS is found to have characteristics different from the normal earthquake sequences occurring in the nearby region of RTS sites. The book deals with the RTS mechanism, how to find safer sites for construction of artificial water reservoir and related issues. Among all the RTS sites, Koyna, India is most prominent where the largest RTS event of magnitude 6.3 occurred in 1967 and RTS has continued till now. A detailed description of the studies conducted at Koyna, India including setting up a bore-hole observatory for near-field study of earthquakes is provided. It is shown that the important question as to how earthquakes nucleate could be found from studies at Koyna, India and RTS sites elsewhere in the world. The book also provides an overview of the injection induced earthquakes occurring in Oklahoma, USA.
Up-to-date information provided on artificial water reservoir triggered earthquakes globally Offers ways to find safer sites for creating artificial water reservoirs avoiding the occurrence of earthquakes Provides detailed information on Koyna, India RTS site where a network of 8 seismic stations are in place
Autor*in
Harsh K. Gupta
Themen in »Artificial Water Reservoir Triggered Seismicity«
Geotechnical engineering Geophysics and environmental physics Pore-fluid pressure Permeability Water reservoir levels Diffusion Borehole Earthquake occurrence Artificial water reservoirs Reservoir triggered seismicity