1. Istituto Nazionale di Geofisica e Vulcanologia; Sezione di Bologna; Bologna Italy
2. Ecole et Observatoire des Sciences de la Terre, Laboratoire de Sismologie, Institut de Physique du Globe de Strasbourg; Université Louis Pasteur, CNRS; Strasbourg France
3. Department of Geological Sciences; Indiana University; Bloomington Indiana USA
4. Seismology and Computational Rock Physics Laboratory; University College Dublin; Dublin Ireland
5. Institute of Geodynamics Sabba Stefanescu; Romanian Academy; Bucharest Romania