High time-resolved studies of stick-slip show similar dilatancy to fast and slow earthquakes.

ABSTRACT: Fast and slow earthquakes are two modes of energy release by the slip in tectonic fault rupture. Although fast and slow slips were observed in the laboratory stick-slip experiments, due to the sampling rate limitation, the details of the fault thickness variation were poorly understood. Especially, why a single fault would show different modes of slip remains elusive. Herein, we report on ring shear experiments with an ultrahigh sampling rate (10 MHz) that illuminate the different physical processes between fast and slow slip events. We show that the duration of slips ranged from dozens to hundreds of milliseconds. Fast slip events are characterized by continuous large-amplitude AE (acoustic emission) and somewhat intricate variation of the sample thickness: A short compaction pulse during

SUBMITTER: Hu W 

PROVIDER: S-EPMC10666130 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature