Roundup of Global Volcanic Activity – New Activity
Bogoslof (United States, Aleutian Islands): Another brief, but violent explosion occurred at the volcano two hours ago, in the early afternoon local time (13:24 AKST or 22:24 GMT). It only lasted about 5 minutes, but produced an ash plume that reached 35,000 ft (12 km) altitude and was also spotted by pilots en route nearby. The volcanic cloud moved north from the volcano.
Ongoing Activity for the week of 28 December-3 January 2017
Bagana | Bougainville (Papua New Guinea) : Based on analyses of satellite imagery and model data, the Darwin VAAC reported that on 31 December ash plumes from Bagana rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted 35-55 km NE, E, and ESE. Only weak steam emissions were observed the next day.
Bulusan | Luzon (Philippines) : PHIVOLCS reported that a phreatic explosion occurred at 1440 on 29 December from a vent on Bulusan’s upper SE flank. The seismic network recorded the event as an explosion-type earthquake that lasted about 16 minutes. A grayish ash plume rose 2 km above the vent and drifted WSW, causing minor amounts of ash to fall in areas downwind including the barangays of Cogon, Tinampo, Bolos, Umagom, Gulang-gulang, and Monbon of Irosin, and Caladgao and Guruyan of Juban. Residents of Guruyan, Juban, Monbon, and Tinampo of Irosin noted a sulphur odour. The Alert Level remained at 1, indicating abnormal conditions and a 4-km-radius Permanent Danger Zone (PDZ).
Colima | Mexico : Based on webcam and satellite images, information from the Mexico City MWO, and wind data the Washington VAAC reported that during 28 December 2016-3 January 2017 ash plumes from Colima rose to altitudes of 4.6-7.6 km (15,000-25,000 ft) a.s.l. and drifted as far as 135 km in multiple directions.
Copahue | Central Chile-Argentina border : Based on satellite and webcam images, the Buenos Aires VAAC reported that during 28-30 December continuous gas-and-ash emissions from Copahue rose to altitudes of 3.6-3.9 km (12,000-13,000 ft) a.s.l. and drifted S, SSE, ESE, and E.
Dukono | Halmahera (Indonesia) : Based on analyses of satellite imagery and model data, the Darwin VAAC reported that during 28-29 and 31 December ash plumes from Dukono rose to altitudes of 2.1-2.4 km (7,000-8,000 ft) a.s.l. and drifted as far as 55 nm SE, S, and SSW.