Seismic regularity coefficient changes precede stronger earthquakes in Santorini swarm

We have been analyzing the ongoing seismic swarm in Santorini, Greece, with the Seismic Regularity (dc) and Seismic Strain Dynamics (SSD) coefficients, which quantify temporal changes in seismic process organization and strain energy release. Stronger earthquakes are preceded by characteristic down-up changes of dc. Such a change indicates an increase in the seismic process regularity followed by a fast transition to a more irregular and chaotic seismic regime.