Joachim M Wassermann, Ludwig Maximilians University of Munich, Munich, Germany, Felix Bernauer, LMU Munich, Munich, Germany, Thomas Braun, INGV, Arezzo, Italy, Heiner Igel, Ludwig-Maximilian Univ, Muenchen, Germany, Maurizio Ripepe, Universita di Firenze, Dipartimento di Scienze della Terra, Firenze, Italy and Frederic Guattari, iXblue, Saint Germain en Laye, France