Frictional response of simulated faults to normal stresses perturbations probed with ultrasonic waves

Srisharan Shreedharan1, Jacques Riviere2,3 and Chris Marone2, (1)Pennsylvania State University Main Campus, University Park, PA, United States, (2)Penn State University, Department of Geosciences, University Park, PA, United States, (3)ISTerre Institute of Earth Sciences, Saint Martin d'Hères, France