[1] China Univ Min & Technol, Sch Environm Sci & Spatial Informat, Xuzhou, Peoples R China
[2] China Univ Min & Technol, Coll Geosci & Surveying Engn, Beijing, Peoples R China
[3] Beijing Normal Univ, Key Lab Environm Change & Nat Disasters, Minist Educ, Beijing 100875, Peoples R China
[4] Ist Nazl Geofis & Vulcanol, Sez Roma 2, Rome, Italy
[5] Univ Chieti Pescara G dAnnunzio, Dipartimento Geotecnol Ambiente & Terr, Chieti, Italy
[6] Univ Siena, Scuola Dottorato Sci Polari, I-53100 Siena, Italy