Surface deformation and earthquake swarms are correlated in space time with operations at the Brawley geothermal field southern California. The seismicity culminated 2012, about 2 years after onset of activity, a M5.4 earthquake. These earthquakes occurred >5km depth, much larger than ∼1km reach wells, raising questions triggering mechanism. shows that aseismic slip on normal fault intersecting...

Fluid injection into rocks is increasingly used for energy extraction and for fluid wastes disposal, and can trigger/induce small- to medium-scale seismicity. Fluctuations in pore fluid pressure may also be associated with natural seismicity. The energy release in anthropogenically induced seismicity is sensitive to amount and pressure of fluid injected, through the way that seismic moment rele...

The Mw 7.9 Denali fault earthquake ruptured segments of the Susitna Glacier, Denali, and Totschunda faults in central Alaska, providing a unique opportunity to look for intermediate-term (weeks to months) responses of active volcanoes to shaking from a large earthquake. The Alaska Volcano Observatory (AVO) monitors 24 volcanoes with seismograph networks. We examined one station per volcano. Dig...