קולוקוויום בחוג לגאופיזיקה: The physics of earthquake nucleation and faulting: From slip-pulses to frictional rupture
Eran Bouchbiner, Weizmann Institute of Science
The onset of rapid/violent slip along frictional faults, the process of "earthquake nucleation'', and the subsequent spatiotemporal faulting dynamics, play important roles in earthquake physics. In this talk, I will provide an overview of our recent progress in relation to these topics. First, the existence and stability of slip-pulses, i.e. of spatially compact propagating frictional rupture, will be discussed. Second, the idea that unstable slip-pulses may serve as "critical nuclei" for earthquakes along initially quiescent faults, in a non-equilibrium analogy to equilibrium first-order phase transitions, will be discussed. Finally, the origin of stress drops – one of the few remotely observable parameters in earthquake physics – in the post-nucleation faulting dynamics will be elucidated in light of the relations between frictional rupture and ordinary cracks.
Physical Review Letters 121, 234302 (2018)
Physical Review X, in press (2019). Available at: arXiv:1906.11533
מארגני האירוע: ד"ר רועי ברקן וד"ר אסף ענבל