Fig. 2
From: Lower-crustal earthquakes in southern Tibet are linked to eclogitization of dry metastable granulite
History of mechanical behavior and AE activity of a G sample (D1996) during deformation. a Differential stress and strain. Note large fluctuation in stress between 2700 and 5400 s. At macroscopic failure (centered around 6000 s, between two vertical dashed lines), a sudden jump in strain is observed (dashed box), associated with a > 50% stress drop. Inset is enlarged portion of the dashed box, showing the strain jump. b AE rates (in # per min) and cumulative energy release (in arbitrary units) during deformation. Note the two broad burst episodes and the peak centered around 6000 s, which corresponds to the strain jump and stress drop in a. c Individual relative AE energy (in arbitrary units) and energy release rate. Only two events near 3600 s are significantly large than the rest. The rest of the AE events have similar magnitudes, corresponding to MW around −8.4–8.845. Energy release rate also peaked around 6000 s. Vertical dashed lines mark the time window in which the AE activity peak (b, c) coincides with the strain jump during the stress drop (a)
