TY  - JOUR
PY  - 2015//
TI  - Induced seismicity: seismicity triggered by fluid injection-induced aseismic slip
JO  - Science
A1  - Guglielmi, Yves
A1  - Cappa, Frédéric
A1  - Avouac, Jean-Philippe
A1  - Henry, Pierre
A1  - Elsworth, Derek
SP  - 1224
EP  - 1226
VL  - 348
IS  - 6240
N2  - Anthropogenic fluid injections are known to induce earthquakes. The mechanisms involved are poorly understood, and our ability to assess the seismic hazard associated with geothermal energy or unconventional hydrocarbon production remains limited. We directly measure fault slip and seismicity induced by fluid injection into a natural fault. We observe highly dilatant and slow [~4 micrometers per second (μm/s)] aseismic slip associated with a 20-fold increase of permeability, which transitions to faster slip (~10 μm/s) associated with reduced dilatancy and micro-earthquakes. Most aseismic slip occurs within the fluid-pressurized zone and obeys a rate-strengthening friction law μ = 0.67 + 0.045ln(v/v₀) with v₀ = 0.1 μm/s. Fluid injection primarily triggers aseismic slip in this experiment, with micro-earthquakes being an indirect effect mediated by aseismic creep.<p />  <p>Language: en</p>
LA  - en
SN  - 0036-8075
UR  - http://dx.doi.org/10.1126/science.aab0476
ID  - ref1
ER  -