Mai, P. M., Vyas, J., Gabriel, A.-A., and Ulrich, T.: Earthquake rupture properties in presence of thermal -pressurization of pore fluids, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-15202, https://doi.org/10.5194/egusphere-egu21-15202, 2021.
Type of publication
Year of publication
EGU General Assembly 2021
Frictional heat generated in the fault core during earthquake rupture can raise the fluid pressure in the slip zone. Such increase of fluid pressure decreases the effective normal stress and thereby lowers the frictional strength of the fault. Therefore, thermal pressurization (TP) of pore fluid affects earthquake rupture processes including nucleation, propagation, and arrest. While the effects of pore pressure and fluid flow rate on dynamic weakening of faults are qualitatively understood, a detailed analysis of how TP affects earthquake rupture parameters is needed to further deepen our understanding.