EGU21-8682
https://doi.org/10.5194/egusphere-egu21-8682
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

On the depth-dependent stress accumulation for earthquake generation process

Hideo Aochi1,2 and Kenichi Tsuda3
Hideo Aochi and Kenichi Tsuda
  • 1BRGM, DRP/SPU, Orleans Cedex 2, France (h.aochi@brgm.fr)
  • 2Laboratoire de Géologie, CNRS - École Normale Supérieure - PSL University, Paris, France (aochi@geologie.ens.fr)
  • 3Institute of Technology, Shimizu Corporation, Tokyo, Japan (kenichi.tsuda@shimz.co.jp)

Dynamic rupture simulation of an earthquake mostly aims at a characteristic event, which may rupture the entire seismogenic zone of a fault system, perhaps reaching the ground surface. However, hazardous earthquakes sometimes occur along a part of the depths of a fault. Many questions arise why only this particular depth does rupture and whether the surrounding part remains hazardous. Previously, Aochi (GJI, 2018) has considered a depth-dependent stress accumulation for emphasizing the difference of reverse and normal faults under the hypothesis that stress is sufficiently and uniformly charged at all depths. We probably need to revise this hypothesis and the partially charged fault along depth would be more suitable for explaining the given question. By developing the previous simulations by Aochi (GJI, 2018), we carry out numerical simulations for demonstrating the importance of the depth-dependent stress accumulation.  

How to cite: Aochi, H. and Tsuda, K.: On the depth-dependent stress accumulation for earthquake generation process, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-8682, https://doi.org/10.5194/egusphere-egu21-8682, 2021.

Corresponding presentation materials formerly uploaded have been withdrawn.