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The U.S. Bureau of Reclamation's Paradox Valley Unit (PVU) extracts aquifer brine from nine shallow wells along the Dolores River, Paradox Valley, in southwestern Colorado and, after treating, high pressure injects the brine 4.3-4.8 km below the surface. PVU injects at rates between [~]800 and [~]1300 L/min. Since 1991, PVU has emplaced over 4 x 106 m3 of fluid and induced more than 4000 surface-recorded seismic events. The events are recorded on the local 15-station Paradox Valley Seismic Network. The induced seismicity at Paradox separates into two distinct source zones: a principle zone (>95% of the events) asymmetrically surrounding the injection well to a maximum radial distance of [~]3 km, and a secondary,...
    map background search result map search result map Deep-Injection and Closely Monitored Induced Seismicity at Paradox Valley, Colorado Deep-Injection and Closely Monitored Induced Seismicity at Paradox Valley, Colorado