Paléosismologie, géométrie des failles et cycle sismique | INSTITUT DE PHYSIQUE DU GLOBE DE PARIS

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Équipes de recherche

Tectonique et mécanique de la lithosphère

  Paléosismologie, géométrie des failles et cycle sismique

Participants hors IPGP : 
many french and foreign collaborations

One of the targets of the tectonic lab is to track any evidence related to the way faults accommodate deformation, at different time scales. In continental setting, it means that each large earthquake is a new opportunity to learn more about the way a rupture propagates along a series of fault segments and deals with preexisting fault geometry. Hence, several of the recent large continental earthquakes have been extensively studied by one or several members of the tectonic team, describing the rupture pattern (Klinger et al., 2005; Xu et al., 2009; Rockwell & Klinger, 2013) and fault geometry (Klinger et al., 2006; Klinger 2010). Part of this work is realized in the field, but remote sensing is also extensively used, using optical images and InSar to map and measure deformations (Rosu et al., 2014).

The study of past earthquake, paleoseismology, is also conducted along several major continental faults, mostly in Asia and in Middle East, to understand recurrence pattern for earthquakes (Klinger et al., 2011, Sapkota et al., 2013, Wechsler et al., 2014).

Eventually, we expend the studied time window to the entire Quaternary to link instantaneous deformation (earthquakes) to cumulative deformation (Le Béon et al., 2010; 2013).

All these approaches are finally integrated in a longer term project that aims at understanding how faults accommodate distant boundary conditions (Vallage et al., 2014), to what extent geometry control the faulting process and how the succession of earthquakes eventually modifies the geometry of faults.

 

This work is funded by several ANR project, INSU, and CNES

 

 

trench across the Dead Sea Fault, Jordan
View toward west of a trench across the Dead Sea fault, in Jordan, in 2014, to identify paleoearthquakes that ruptured this fault along its southern segment. (Y. Klinger)