TY  - JOUR
ID  - epos2273
UR  - https://doi.org/10.1126/science.aat5449
IS  - 6405
A1  - Goebel, Thomas H. W.
A1  - Brodsky, Emily E.
Y1  - 2018///
N2  - Fluid injection can cause extensive earthquake activity, sometimes at unexpectedly large distances. Appropriately mitigating associated seismic hazards requires a better understanding of the zone of influence of injection. We analyze spatial seismicity decay in a global dataset of 18 induced cases with clear association between isolated wells and earthquakes. We distinguish two populations. The first is characterized by near-well seismicity density plateaus and abrupt decay, dominated by square-root space-time migration and pressure diffusion. Injection at these sites occurs within the crystalline basement. The second population exhibits larger spatial footprints and magnitudes, as well as a power law?like, steady spatial decay over more than 10 kilometers, potentially caused by poroelastic effects. Far-reaching spatial effects during injection may increase event magnitudes and seismic hazard beyond expectations based on purely pressure-driven seismicity.
PB  - American Association for the Advancement of Science
JF  - Science
VL  - 361
SN  - 0036-8075
TI  - The spatial footprint of injection wells in a global compilation of induced earthquake sequences
SP  - 899
AV  - none
EP  - 904
ER  -