Roundup of Global Volcanic Activity

Bogoslof (United States, Aleutian Islands): Yet another powerful explosion occurred at the volcano today at 13:17 AKST local time (22:17 GMT). It produced a plume that rose to 36,000 ft (12 km) altitude and drifted to the southeast over the southwest end of Unalaska Island. The eruption, among the strongest so far, followed an 30 minute period of increasing seismic activity. During the eruption, the Alaska Volcano Observatory (AVO) reported very hot material (likely lava) at the vent seen on satellite data, a single lightning strike and infrasound signals detected by sensors in Dillingham. The Aviation Colour Code of Bogoslof volcano remains at RED and the Alert Level remains at WARNING. (AVO)

Colima (Western Mexico): Vulcanian-type (sudden, but very strong) explosions continue to occur at the volcano. Following the powerful eruption early on Thu 19 Jan, another, an even stronger explosion – one of the most energetic in recent years – occurred in the evening of the same day at 22:16. It started with a violent cannon-shot like explosion that propelled incandescent bombs to heights well over 2000 meters and covered the whole cone and its lower flanks with impacts, igniting bush fires. Pyroclastic flows from collapsing material also descended the flanks and an ash plume rose to several kilometres height. Some of the explosions are large enough to send incandescent bombs all over the summit cone and produce small pyroclastic flows and eruption lightning.


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