Offshore seismicity clusters in the West Iberian Margin  illustrated by 2 decades of events

Fernández-Viejo, Gabriela; López-Fernández, Carlos; Cadenas, Patricia

doi:https://doi.org/10.5194/se-14-1083-2023

Articles | Volume 14, issue 10

https://doi.org/10.5194/se-14-1083-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

(D)rifting into the future: the relevance of rifts and divergent...

https://doi.org/10.5194/se-14-1083-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 14, issue 10

Research article

|

23 Oct 2023

Research article |

| 23 Oct 2023

Offshore seismicity clusters in the West Iberian Margin illustrated by 2 decades of events

Gabriela Fernández-Viejo, Carlos López-Fernández, and Patricia Cadenas

Data sets

Global Multi-Resolution Topography (GMRT) synthesis data set (https://www.geomapapp.org/) W. B. F. Ryan, S. M. Carbotte, J. Coplan, S. O'Hara, A. Melkonian, R. Arko, R. A. Weissel, V. Ferrini, A. Goodwillie, F. Nitsche, J. Bonczkowski, and R. Zemsky https://doi.org/10.1029/2008GC002332

Short summary

The seismic activity of the last 20 years within the West Iberian Margin away from the plate boundaries has been analyzed through the Spanish and Portuguese seismic network public databases. Previously defined as diffuse, the study reveals two distinct clusters in the NW–SE direction. Based on the characteristics of the events, some hypotheses for this activity are put forward and discussed, indicating the need for ocean-bottom seismometer data and high-resolution fault mapping.