Roundup of Global Volcanic Activity
Shiveluch (Kamchatka): Activity is currently relatively low, but the volcano continues to extrude viscous lava into the dome. Occasional small avalanches, explosions and strong steaming accompany this activity.
Chirpoi (Kurile Islands, Russia): SVERT reported that satellite images over Snow, a volcano of Chirpoi, detected a thermal anomaly on 21 and 27 April. Cloud cover obscured views on the other days during 22-28 April. The Aviation Color Code remained at Yellow.
Chirinkotan (Northern Kuriles): SVERT reported that satellite images of Chirinkotan showed gas-and-steam emissions on 25 and 27 April. Cloud cover obscured views during 21-28 April. The Aviation Color Code remained at Yellow.
Suwanose-jima (Ryukyu Islands): After some weeks of no or less visible activity, the volcano has again become more active and bright glow is visible above the crater at night, suggesting the near-continuous small strombolian-type explosions or perhaps even the presence of a small lava lake. A larger explosion on 29 April produced an ash plume that rose to an altitude of 1.2 km (4,000 ft) a.s.l. and drifted E.
Bagana (Bougainville Island, Papua New Guinea): An explosion occurred this morning. A volcanic ash plume rose to 7,000 ft (2.1 km) altitude and drifted 40 km to the SSE (VAAC Darwin).
Soputan (North Sulawesi, Indonesia): As the 5th volcano in Indonesia currently on orange alert, the alert level of Soputan was raised to “siaga” (or 3 on a scale of 1-4) by VSI this morning. The decision came as a result of a marked increase in seismic activity over the past day. Seismic activity started to be elevated early this year. The volcano is one of Indonesia’s most frequently active and typically erupts every few years, often with only short periods of precursory seismic activity. The last eruption occurred in 2012, and the current crisis could very well lead to a new eruption in the near future. At the moment, an exclusion zone of 6.5 km radius is in place around the volcano.
Dukono (Halmahera): Activity remains elevated. Strombolian to vulcanian-type explosions produce ash plumes, typically reaching about 8,000 ft (2.4 km) altitude that are spotted every day on satellite imagery.
Shishaldin (United States, Aleutian Islands): AVO reported that although cloud cover occasionally prevented web-cam and satellite observations of Shishaldin’s summit area during 23-29 April, periods of elevated surface temperatures and minor steaming were observed. No significant changes were detected in seismic data. The Aviation Colour Code remained at Orange and the Volcano Alert Level remained at Watch.
Popocatépetl (Central Mexico): No significant changes in activity have occurred. CENAPRED reported 73 low-intensity exhalations during 29-30 April, some of which produced small puffs of ash. Glow at the crater remains visible at night. A small volcanotectonic earthquake of magnitude 2.4 occurred on 29 April at 13:44 local time.
Ubinas (Peru): Ash emissions and occasional small explosions continue at reduced intensity.