[1] Univ Torino, Dipartimento Sci Terra, Turin, Italy
[2] Univ Torino, Ctr Interdipartimentale Rischi Nat Ambiente Monta, Turin, Italy
[3] Osserv Vesuviano, Ist Nazl Geofis & Vulcanol, Naples, Italy
[4] Univ Firenze, Dipartimento Sci Terra, Florence, Italy
[5] Engn Ingn Informat SpA, Rome, Italy
[6] Icelandic Meteorol Off, Reykjavik, Iceland
[7] Serv Nacl Geol & Mineria, Santiago, Chile
[8] Inst Geofis Peru, Lima, Peru
[9] Vanuatu Meteorol & Geohazards Dept, Port Vila, Vanuatu
[10] Inst Nacl Sismol Vulcanol Meteorol & Hidrol, Guatemala City, Guatemala
[11] US Geol Survey, Volcano Disaster Assistance Program, 959 Natl Ctr, Reston, VA 22092 USA
[12] Serv Geol Colombiano, Bogota, Colombia
[13] Univ Nacl San Agustin Arequipa, Fac Geol Geofis & Minas, Arequipa, Peru
[14] Goma Volcano Observ, Goma, Rep Congo
[15] Ctr Volcanol & Geol Hazard Mitigat, Bandung, Indonesia
[16] Escuela Politec Nacl, Inst Geofis, Quito, Ecuador
[17] Inst Geol Minero & Met, Lima, Peru
[18] Univ Paris, Inst Phys Globe Paris, CNRS, Paris, France
[19] Inst Phys Globe Paris, Observ Volcanol Piton Fournaise, La Plaine Des Cafres, France
[20] Dept Mineral Policy & Geohazards Management, Port Moresby, Papua N Guinea
[21] Royal Netherlands Meteorol Inst, De Bilt, Netherlands
[22] Univ Colima, Colima Intercambio & Invest Vulcanol, Colima, Mexico