The advent of novel technologies have boosted our capability of acquiring new evidences that faults behavior is various and extremely sensitive to a large number of parameters. These evidences are supported in natural earthquakes by the occurence of a large pletora of events spanning from slow to fast earthquakes, precursory slips, non volcanic tremors and low frequency earthquakes. The aim of this session is to convey interdisciplinary studies on fault behaviour and processes controlling the propagation of slip instabilities in rocks, granular materials and/or laboratory analogs; we invite contributions at the frontiers between Rock Mechanics, Models, Seismology, Tectonics and Mineralogy dealing with either slow, fast or transient evolution of earthquakes and earthquake sequences in shallow and deep environments; we welcome studies performed at the laboratory and field scale, providing insights on earthquake evolution and/or constraining observed seismological statistical laws like Omori’s and Gutenberg-Richter’s; we welcome innovative techniques that help the observations and take advantage of high-speed imaging and continuous acoustic emission streaming data.