Synchronization and Triggering: from Fracture to Earthquake Processes

This monograph contains experimental and theoretical considerations on synchronization and triggering in laboratory fracture experiments and in earthquake processes. Non-linear dynamics and physics of rotation motions reveal such ordering in geophysical processes and observed time series. Presented experiments with electromagnetic and mechanical forcing present synchronization of the slip instabilities observed as acoustic burst emission. New observational results, based on the net of broadband seismic stations, indicate the hidden periodicities, multiple coherence effects in the low-frequency microseismic oscillations observed tens of hours before the earthquakes. These results are supported by observational evidence on synchronization between shear oscillations and rotation motions in microseismic field before earthquakes.