Earthquakes are inherently non-linear and multi-scale phenomena, with dynamics that are strongly dependent on the geometry and the physical properties of faults and their surrounding media. To investigate their complex behavior (fault stability, rupture nucleation and propagation, seismic cycle complexity), fault systems are often scaled down in laboratory experiments to explore their underlying physics under controlled conditions. However, extrapolating laboratory-scale observations to natural fault systems remains a significant challenge. Numerical simulations help bridge this gap by linking processes across scales and improving our understanding of fault mechanics. Together, laboratory experiments, numerical simulations, and geophysical observations provide complementary approaches that are essential to understanding fault mechanics across scales.


In this session, we aim to bring together multidisciplinary contributions that address key aspects of earthquake mechanics, combining laboratory, geophysical, and numerical observations, including:

(i) thermo-hydro-mechanical processes governing fault behavior throughout the seismic cycle;
(ii) the fault slip spectrum, from aseismic slip to dynamic earthquake rupture;
(iii) bridging spatial and temporal scales of fault deformation mechanisms.

We particularly encourage contributions with novel observations and innovative methodologies for studying earthquake faulting. Contributions from early-career scientists are highly welcome.