Erosion influences the seismicity of active thrust faults - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Nature Communications Year : 2014

Erosion influences the seismicity of active thrust faults

Philippe Steer
Martine Simoes


Assessing seismic hazards remains one of the most challenging scientific issues in Earthsciences. Deep tectonic processes are classically considered as the only persistentmechanism driving the stress loading of active faults over a seismic cycle. Here we show via amechanical model that erosion also significantly influences the stress loading of thrust faultsat the timescale of a seismic cycle. Indeed, erosion rates of about B0.1–20mmyr1, asdocumented in Taiwan and in other active compressional orogens, can raise the Coulombstress by B0.1–10 bar on the nearby thrust faults over the inter-seismic phase. Masstransfers induced by surface processes in general, during continuous or short-lived andintense events, represent a prominent mechanism for inter-seismic stress loading offaults near the surface. Such stresses are probably sufficient to trigger shallow seismicity orpromote the rupture of deep continental earthquakes up to the surface.


Earth Sciences
Fichier principal
Vignette du fichier
Steer2014_NatureComm_accepted.pdf (768.32 Ko) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

insu-01087103 , version 1 (25-11-2014)



Philippe Steer, Martine Simoes, Rodolphe Cattin, J. Bruce H. Shyu. Erosion influences the seismicity of active thrust faults. Nature Communications, 2014, 5, pp.Art n°5564. ⟨10.1038/ncomms6564⟩. ⟨insu-01087103⟩
297 View
271 Download



Gmail Facebook X LinkedIn More