Fig. 3: Build-up and release of fluid-induced stress.
From: Fluid migrations and volcanic earthquakes from depolarized ambient noise
a The polarization parameters have been plotted using data spread across one month before and after both the Md3.1 and the Md3.3 earthquakes. Black diamonds correspond to the earthquake locations between June and December 198416. The white dotted line contours the extensional faults when visible and continuous. Migrated fluids break this continuity. b The olarization parameters were computed using three hours of noise on a single day, before and after the Md3.1 and Md3.3.
