<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Spatiotemporal changes, faulting regimes, and source parameters of induced seismicity: A case study from The Geysers geothermal field"^^ . "The spatiotemporal, kinematic, and source characteristics of induced seismicity occurring at\r\ndifferent fluid injection rates are investigated to determine the predominant physical mechanisms responsible\r\nfor induced seismicity at the northwestern part of The Geysers geothermal field, California. We analyze a\r\nrelocated hypocenter catalog from a seismicity cluster where significant variations of the stress tensor orientation\r\nwere previously observed to correlate with injection rates. We find that these stress tensor orientation changes\r\nmay be related to increased pore pressure and the corresponding changes in poroelastic stresses at reservoir\r\ndepth. Seismic events during peak injections tend to occur at greater distances from the injection well,\r\npreferentially trending parallel to themaximum horizontal stress direction. In contrast, at lower injection rates the\r\nseismicity tends to align in a different direction which suggests the presence of a local fault. During peak\r\ninjection intervals, the relative contribution of strike-slip faulting mechanisms increases. Furthermore, increases\r\nin fluid injection rates also coincide with a decrease in b values. Our observations suggest that regardless of the\r\ninjection stage, most of the induced seismicity results from thermal fracturing of the reservoir rock. However,\r\nduring peak injection intervals, the increase in pore pressure may likewise be responsible for the induced\r\nseismicity. By estimating the thermal and hydraulic diffusivities of the reservoir, we confirm that the characteristic\r\ndiffusion length for pore pressure is much greater than the corresponding length scale for temperature and also\r\nmore consistent with the spatial extent of seismicity observed during different injection rates."^^ . "2014-11" . . "119" . "11" . . "John Wiley & Sons"^^ . . . "Journal of Geophysical Research: Solid Earth"^^ . . . "21699313" . . . . . . . . . . . . . . . . . . . . "Patricia"^^ . "Martinez-Garzon"^^ . "Patricia Martinez-Garzon"^^ . . "Craig"^^ . "Hartline"^^ . "Craig Hartline"^^ . . "Hiroki"^^ . "Sone"^^ . "Hiroki Sone"^^ . . "Grzegorz"^^ . "Kwiatek"^^ . "Grzegorz Kwiatek"^^ . . "Georg"^^ . "Dresen"^^ . "Georg Dresen"^^ . . "Marco"^^ . "Bohnhoff"^^ . "Marco Bohnhoff"^^ . . "Helmholtz-Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany"^^ . . . "Helmholtz-Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany"^^ . . . "Helmholtz-Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany"^^ . . . "Helmholtz-Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany, Institute of Geological Sciences, Free University Berlin, Berlin, Germany"^^ . . . "Helmholtz-Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany, 3Institute of Earth and Environmental Sciences, University of Potsdam, Potsdam, Germany"^^ . . . "Calpine Corporation, Middletown, California, USA"^^ . . . . . . "HTML Summary of #1685 \n\nSpatiotemporal changes, faulting regimes, and source parameters of induced seismicity: A case study from The Geysers geothermal field\n\n" . "text/html" . . . "Source parameter estimation" . . . "Collective properties of seismicity" . . . "Technology-seismicity interaction" . . . "Geysers" . . . "Geothermal energy production" . .