Glacial-isostatic-adjustment strain rate–stress paradox in the Western Alps and impact on active faults and seismicity

Grosset, Juliette; Mazzotti, Stéphane; Vernant, Philippe

doi:https://doi.org/10.5194/se-14-1067-2023

Articles | Volume 14, issue 10

https://doi.org/10.5194/se-14-1067-2023

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

https://doi.org/10.5194/se-14-1067-2023

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

Articles | Volume 14, issue 10

Research article

|

18 Oct 2023

Research article |

| 18 Oct 2023

Glacial-isostatic-adjustment strain rate–stress paradox in the Western Alps and impact on active faults and seismicity

Juliette Grosset, Stéphane Mazzotti, and Philippe Vernant

Supplement

https://doi.org/10.5194/se-14-1067-2023-supplement

Model code and software

Software gFlex_load_SE for Glacial Isostatic Adjustment impact on Western Alps Juliette Grosset and Stéphane Mazzotti https://doi.org/10.5281/zenodo.8434592

Short summary

In glaciated regions, induced lithosphere deformation is proposed as a key process contributing to fault activity and seismicity. We study the impact of this effect on fault activity in the Western Alps. We show that the response to the last glaciation explains a major part of the geodetic strain rates but does not drive or promote the observed seismicity. Thus, seismic hazard studies in the Western Alps require detailed modeling of the glacial isostatic adjustment (GIA) transient impact.