Seismicity parameters dependence on mainshock-induced co-seismic stress

SUMMARY The Gutenberg–Richter (GR) and the Omori–Utsu (OU) law describe earthquakes’ energy release temporal clustering are thus of great importance for seismic hazard assessment. Motivated by experimental results, which indicate stress-dependent parameters, we consider a combined global data set 127 main shock–aftershock sequences perform systematic study relationship between shock-induced stress changes associated seismicity patterns. For this purpose, calculate space-dependent Coulomb Stress (ΔCFS) alternative receiver-independent metrics in surrounding shocks. Our results clear positive correlation GR b-value induced stress, contrasting expectations from laboratory experiments suggesting crucial role structural heterogeneity strength variations. Furthermore, demonstrate that aftershock productivity increases nonlinearly with while OU parameters c p systematically decrease increasing changes. partly unexpected findings can have an important impact on future estimations hazard.