Earthquake lights and rupture processes

Earthquake lights and rupture processes

A physical model of earthquake lights is proposed. It is suggested that the magnetic diffusion from the electric and magnetic fields source region is a dominant process, explaining rather high localization of the light flashes. A 3D numerical code allowing to take into account the arbitrary distribution of currents caused by ground motion, conductivity in the ground and at its surface, includin...

Modelling the Micro-physics Underlying Earthquake Nucleation Processes and Rupture

Objectives Modelling microscopic properties of rock allows simulation of non-linear and complex macroscopic behaviour. Rather than specifying a "true" representation of rock at a microscopic scale, models use empirical properties at a mesoscopic scale such that the correct macroscopic behaviour is simulated. The objectives of the session \Modelling the micro-physics underlying earthquake nuclea...

Theory of Precursory Processes in the Inception of Earthquake Rupture

The paper reviews models for inelastic deformation processes preceding earthquake rupture in brittle, natural rock masses. The discussion is organized around three types of failure models: (i) localization bifurcations, whereby a uniform or nearly uniform pattern of deformation gives way to highly localized deformations within a fault zone; (ii) non-homogeneous deformations due to an inclusion-...

Diverse rupture processes in the 2015 Peru deep earthquake doublet

Earthquakes in deeply subducted oceanic lithosphere can involve either brittle or dissipative ruptures. On 24 November 2015, two deep (606 and 622 km) magnitude 7.5 and 7.6 earthquakes occurred 316 s and 55 km apart. The first event (E1) was a brittle rupture with a sequence of comparable-size subevents extending unilaterally ~50 km southward with a rupture speed of ~4.5 km/s. This earthquake t...

The Mechanics of Earthquake Rupture