*Francesco Grigoli¹, William L Ellsworth², Miao Zhang³, Simone Cesca⁴, Claudio Satriano⁵, Mostafa Mousavi², Gregory C Beroza², Stefan Wiemer¹ (1.ETH-Zurich, Switzerland, 2.Stanford University, United States, 3.Dalhousie University, Halifax, Canada, 4.GFZ-Potsdam, Germany, 5.IPGP-Paris, France)