Publication Date:
2019
Description:
〈span〉〈div〉Summary〈/div〉Developing a model for anthropogenic seismic hazard remains an open challenge whatever the geo-resource production. We analyze the (M〈sub〉max〈/sub〉) largest reported magnitude on each site where (RTS) Reservoir Triggered Seismicity in documented, (37 events, 1933–2008), for aftershocks of reservoir impoundment loading. We relate each reservoir impoundment to its magnitude-equivalent M*〈sub〉reservoir〈/sub〉 = M*(L〈sub〉r〈/sub〉). We use (L〈sub〉r〈/sub〉) the reservoir length as a proxy for a rupture length of the reservoir mainshock-equivallent. This latter is derived from the empirical relationship that exists for tectonic earthquake among magnitude and rupture length. We resolve (i) M〈sub〉max〈/sub〉 for RTS are bounded by M*〈sub〉reservoir〈/sub〉 at a 95 per cent confidence level; (ii) in average M〈sub〉max〈/sub〉 are smaller than M*〈sub〉reservoir〈/sub〉 by 2.2 units (iii) 50 per cent of the M〈sub〉max〈/sub〉 occurrence is within 2 + /- 1 years from the reservoir impoundment. These triggering patterns support the signature of fluid driven seismicity during the slow reservoir impoundment emerges as a weaker efficiency (larger ΔM = M*〈sub〉reservoir〈/sub〉—M〈sub〉max〈/sub〉) to trigger M〈sub〉max〈/sub〉 events than from earthquake interactions.〈/span〉
Print ISSN:
2051-1965
Electronic ISSN:
1365-246X
Topics:
Geosciences
Published by
Oxford University Press
on behalf of
The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).
