Inter event times of fluid induced earthquakes suggest their Poisson nature

摘要: [1] We analyze the inter event time distribution of fluid-injection-induced earthquakes for six catalogs collected at geothermal injection sites Soultz-sous-Forets and Basel. We find that waiting times during phases constant seismicity rate coincides with exponential homogeneous Poisson process (HPP). complete that, as naturally occurring earthquakes, induced are distributed according to a non in time. Moreover, occurrence volume domain is HPP. These results indicate directly triggered by loading fluid injection. also consider spatial distance between events perform nearest neighbor analysis time-space-magnitude domain. Our including comparison synthetic catalog created ETAS model reveals no signs causal relationships events. Therefore, coupling effects very weak. The seems be good approximation seismicity.