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Title

Surface uplift and time-dependent seismic hazard due to fluid injection in eastern Texas

AuthorsShirzaei, Manoochehr; Ellsworth, William L.; Tiampo, Kristy F.; González, Pablo J. ; Manga, Michael
KeywordsSurface uplift
Time-dependent seismic
Fluid injection
Texas
Issue Date23-Sep-2016
PublisherAmerican Association for the Advancement of Science
CitationScience 353(6306): 1416-1419 (2016)
AbstractObservations that unequivocally link seismicity and wastewater injection are scarce. Here we show that wastewater injection in eastern Texas causes uplift, detectable in radar interferometric data up to >8 kilometers from the wells. Using measurements of uplift, reported injection data, and a poroelastic model, we computed the crustal strain and pore pressure. We infer that an increase of >1 megapascal in pore pressure in rocks with low compressibility triggers earthquakes, including the 4.8–moment magnitude event that occurred on 17 May 2012, the largest earthquake recorded in eastern Texas. Seismic activity increased even while injection rates declined, owing to diffusion of pore pressure from earlier periods with higher injection rates. Induced seismicity potential is suppressed where tight confining formations prevent pore pressure from propagating into crystalline basement rocks.
Publisher version (URL)https://doi.org/10.1126/science.aag0262
URIhttp://hdl.handle.net/10261/214226
DOI10.1126/science.aag0262
ISSN0036-8075
E-ISSN1095-9203
Appears in Collections:(IPNA) Artículos
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