Fault reactivation by gas injection at an underground gas storage off the east coast of Spain

Villaseñor, Antonio; Herrmann, Robert B.; Gaite, Beatriz; Ugalde, Arantza

doi:https://doi.org/10.5194/se-11-63-2020

Articles | Volume 11, issue 1

https://doi.org/10.5194/se-11-63-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/se-11-63-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 11, issue 1

Research article

|

14 Jan 2020

Research article |

| 14 Jan 2020

Fault reactivation by gas injection at an underground gas storage off the east coast of Spain

Antonio Villaseñor, Robert B. Herrmann, Beatriz Gaite, and Arantza Ugalde

Supplement

https://doi.org/10.5194/se-11-63-2020-supplement

Data sets

Regional centroid moment tensors for earthquakes in the 2013 CASTOR gas storage seismic crisis [Dataset] A. Villaseñor, R. B. Herrmann, B. Gaite, and A. Ugalde Aguirre https://doi.org/10.20350/digitalCSIC/8966

Short summary

We present new earthquake focal depths and fault orientations for earthquakes that occurred in 2013 in the vicinity of an underground gas storage off the east coast of Spain. Our focal depths are in the range of 5–10 km, notably deeper than the depth of the gas injection (2 km). The obtained fault orientations also differ from the predominant faults at shallow depths. This suggests that the faults reactivated are deeper, previously unmapped faults occurring beneath the sedimentary layers.