Roundup of Global Volcanic Activity – New Activity for the week 16 March – 22 March 2022
Bezymianny – Central Kamchatka (Russia) : An explosive eruption at Bezymianny began at 0310 on 15 March, producing ash plumes. KVERT raised the Aviation Color Code to Orange (the second highest level on a four-color scale). Activity intensified at 0053 on 16 March and remained elevated for about 30 minutes. During this phase pyroclastic flows descended the S, W, and N flanks, and ash plumes rose as high as 12 km (39,400 ft) a.s.l. that ultimately drifted more than 1,300 km NW and then NE. A large thermal anomaly over the volcano was visible through 18 March, indicating continuing lava-dome growth. Steam-and-gas emissions persisted though 23 March.
Lonquimay – Central Chile : SERNAGEOMIN reported increased seismicity at Lonquimay during the first half of March, characterized by hybrid (HB) signals accompanied by long-period (LP) events, and fewer volcano-tectonic (VT) events. Only some of the HB and VT events could be located where the epicenters were within 2-7 km of the volcano with hypocenters at depths of 4-11 km. The number of HB and VT events increased on 9 March. Deformation was not detected and no abnormal gas emissions were recorded. During 18-21 March two additional earthquakes were recorded, a VT and an HB, both with magnitudes below 1.3. Although the events were low magnitude, the seismicity was anomalous in the data going back to 2010 when monitoring stations were installed.
Manam – Northeast of New Guinea : The Darwin VAAC reported that during 15-17 March ash plumes from Manam rose to 3 km (10,000 ft) a.s.l. and drifted SW, W, and NW.
Ruapehu – North Island (New Zealand) : GeoNet reported that a warming trend of the crater lake water at Ruapehu was evident by 13 March, and by 21 March the temperature was 31 degrees Celsius. The heating cycle was accompanied by strong levels of volcanic tremor, indicating increased gas flux though the system, and an increased likelihood of eruptive activity.
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