Source Spectra Variability of earthquakes preceding the 2011 Mw 9.0 Tohoku-Oki megathrust
Jesus Pina Valdes1, Anne Socquet1, Hugo Samuel Sanchez Reyes2, Fabrice Cotton3 and David Marsan1, (1)ISTerre Institute of Earth Sciences, Saint Martin d'Hères, France, (2)University Joseph Fourier Grenoble, Grenboble, France, (3)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany