Volcanos

Roundup of Global Volcanic Activity – New Activity for the week 25 May – 31 May 2022

Bezymianny – Central Kamchatka (Russia) : KVERT reported that the eruption at Bezymianny continued, characterized by strong fumarolic emissions, lava-dome incandescence, explosions, and hot avalanches. Seismicity increased during 23-28 May. Multiple and notable collapses of hot avalanches on the E flank produced ash plumes that rose to 4-5 km (13,100-16,400 ft) a.s.l. and drifted 70-320 km in multiple directions. Activity significantly increased on 28 May, local time. According to Kamchatka Volcanological Station (Volkstat), observers saw ash plumes from Bezymianny rising over Klyuchevsky volcano around lunchtime. The plume altitudes gradually increased and late in the evening a large, strong, explosive event occurred; ash plumes rose to 11 km (36,100 ft) a.s.l. and drifted E. According to KVERT satellite data showed ash plumes rising 10-12 km (32,800-39,400 ft) a.s.l. and drifting ESE at 1920. The Aviation Color Code was raised to Red (the highest level on a four-color scale). By 2010 the ash plumes had risen to 15 km (49,000 ft) a.s.l., and previous ash emissions had drifted 365 km SE. Volkstat observers noted that activity began to decline by about 2020 and plume altitudes did not exceed 6 km (19,700 ft) a.s.l. and drifted SE. Ash plumes continued to be emitted, though they rose no higher than 5 km based on webcam views. Two ash plumes were identified in satellite images; the first was drifting 212 km SE at an altitude of 9.5 km (31,200 ft) a.s.l. and the second was drifting 650 km SE at unspecified altitudes. On 29 May at 1000 gas-and-steam plumes with some ash were visible in webcam images rising as high as 4.5 km a.s.l. and drifting 45 km SE. Satellite images showed that the large ash cloud from the day before had drifted 1,635 km SE.

Cleveland – Chuginadak Island (USA) : AVO reported that during 24-31 May daily elevated surface temperatures over Cleveland were identified in satellite images, along with plumes of steam and sulfur dioxide gas. Crater subsidence in the summit crater was detected during 26-27 May.

Dempo – Southeastern Sumatra : PVMBG reported that at 0154 on 31 May a phreatic eruption at Dempo produced ashfall in areas within 5 km, including Pagar Alam Utara district (E) and North Dempo District. Ash deposits were as thick as 1 mm.

Yakedake – Honshu (Japan) :On 24 May, a report noted that the number of small volcanic earthquakes with epicenters near the summit began increasing around 2300 the day before. The report also noted that minor inflation near the summit was continuing. Daily small volcanic earthquakes continued to be counted through 31 May.

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