1. Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy
2. Department of Science, Università degli Studi Roma Tre, Via Ostiense 159, 00154 Rome, Italy
3. ALomax Scientific, 320 Chemin des Indes, 06370 Mouans-Sartoux, France
4. Department of Computer Engineering, Faculty of Engineering, University of Rijeka, 51000 Rijeka, Croatia