eprintid: 2273 rev_number: 13 eprint_status: archive userid: 6 dir: disk0/00/00/22/73 datestamp: 2020-07-13 08:03:02 lastmod: 2020-07-13 08:03:02 status_changed: 2020-07-13 08:03:02 type: article metadata_visibility: show creators_name: Goebel, Thomas H. W. creators_name: Brodsky, Emily E. corp_creators: Department of Earth and Planetary Sciences, University of California, Santa Cruz, CA, USA. corp_creators: Department of Earth and Planetary Sciences, University of California, Santa Cruz, CA, USA. title: The spatial footprint of injection wells in a global compilation of induced earthquake sequences subjects: MP4 subjects: RA subjects: RF subjects: RG subjects: RS2 subjects: RU subjects: SG divisions: S4CE-1 divisions: IP4 divisions: SHEER-5 full_text_status: none abstract: 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. date: 2018 date_type: published publication: Science volume: 361 number: 6405 publisher: American Association for the Advancement of Science pagerange: 899-904 id_number: doi:10.1126/science.aat5449 issn: 0036-8075 official_url: https://doi.org/10.1126/science.aat5449 access_IS-EPOS: limited owner: Publisher citation: Goebel, Thomas H. W. and Brodsky, Emily E. (2018) The spatial footprint of injection wells in a global compilation of induced earthquake sequences. Science, 361 (6405). pp. 899-904. DOI: https://doi.org/10.1126/science.aat5449