Volcanos

Roundup of Global Volcanic Activity – Ongoing Activity for the week 1 June – 7 June 2022

Bezymianny – Central Kamchatka (Russia) : KVERT reported that after a notable explosive eruption phase occurred at Bezymianny on 28 May (local date), eruptive activity characterized by strong fumarolic emissions, lava-dome incandescence, and hot avalanches continued through 3 June.

Dukono – Halmahera : Based on satellite and wind model data, and information from ground observers, the Darwin VAAC reported that during 1-7 June ash plumes from Dukono rose to 2.4 km (8,000 ft) a.s.l. and drifted NE, NW, W, and SW.

Etna – Sicily (Italy) : INGV reported that during 30 May-5 June the fissure located at the upper part of Etna’s Valle del Bove, between 2,700 and 2,900 m elevation, continued to produce lava flows at a variable rate. The flows branched and overlapped, reaching 1,900 m elevation by 5 June. Strombolian activity at Southeast Crater (SEC) varied in intensity and frequency, producing ash emissions that drifted SSE; the most intense activity occurred during 1-3 June. Ash plumes rose to around 5 km (16,400 ft) a.s.l. and drifted S on 3 June. On 7 June a new fissure opened at the base of the N wall of the Valle del Bove, in the Serracozzo area, at 1,900-1,950 m elevation. The fissure produced a lava flow that traveled a few tens of meters.

Great Sitkin – Andreanof Islands (USA) : AVO reported that the eruption at Great Sitkin continued during 31 May-7 June, though weather clouds sometimes hindered observations. Surface temperatures were occasionally identified in satellite data, consistent with lava effusion. A few small earthquakes were detected on a few of the days.

Ibu – Halmahera : PVMBG reported that the eruption at Ibu continued during 31 May-7 June. Daily gray-and-white ash plumes of variable densities generally rose 200-800 m above the summit and drifted in multiple directions. An eruptive event at 1116 on 6 June produced a dense gray ash plume that rose 4 km above the summit and drifted W.

Karymsky – Eastern Kamchatka (Russia) : KVERT reported that a thermal anomaly over Karymsky was identified in satellite images during 27 May-3 June.

Kilauea – Hawaiian Islands (USA) : HVO reported that lava continued to effuse from a vent in the lower W wall of Kilauea’s Halema`uma`u Crater during 31 May-7 June, entering the lava lake and flowing onto the crater floor. The surface of the lava lake was continuously active all week, and the lake level was relatively stable, dropping and then rising 6 m. Nearly-continuous breakouts of lava occurred along the margins of the lake.

Lewotolok – Lembata Island : PVMBG reported that the eruption at Lewotolok continued during 1-7 June. Daily white-and-gray emissions rose as high as 1.3 km above the summit and drifted in multiple directions. The summit crater was often incandescent, and the lava flow on the E flank was incandescent during 1-4 June, based on photos in the reports.

Manam – Northeast of New Guinea : The eruption at Manam was ongoing. The Darwin VAAC reported that during 1-3 and 5 June ash plumes rose to 2.4-3 km (8,000-10,000 ft) and drifted NW, W, and SW, based on satellite and webcam images and information from RVO.

Merapi – Central Java : BPPTKG reported that the eruption at Merapi continued during 27 May-2 June. The heights and morphologies of the SW lava dome and the central lava dome were unchanged from the previous week, and seismicity remained at high levels. As many as 101 lava avalanches, reaching a maximum distance of 1.8 km, traveled down the Bebeng drainage on the SW flank. One pyroclastic flow also traveled 1.8 km down the Bebeng drainage. Seismicity remained high.

Pagan – Mariana Islands (USA) : The U.S. Geological Survey reported that a possible sulfur dioxide emission from Pagan was detected on 31 May. The Aviation Color Code and the Volcano Alert Level remained at Unassigned. There are no ground-based instruments, so Pagan is monitored with satellite imagery, distal geophysical data, and mariner reports.

Pavlof – Alaska Peninsula, Alaska : AVO reported that the eruption at a vent on Pavlof’s upper E flank was ongoing during 31 May-7 June, and seismic tremor persisted. A short lava flow from the vent was observed during 31 May-1 June, and daily elevated surface temperatures identified in satellite images during the remainder of the week were consistent with continuing activity.

Rincon de la Vieja – Costa Rica : OVSICORI-UNA reported continuing eruptive activity at Rincón de la Vieja characterized by small phreatic explosions. A minor emission was possibly recorded on 4 June, though it could not be visually confirmed due to darkness. An eruptive event at 0804 on 6 June produced a steam plume that rose about 3 km above the summit. Sulfur dioxide from the plume was detected by an instrument located to the S. Another event was recorded at 1204 later that day, though a plume was not visible due to weather conditions.

Ruapehu – North Island (New Zealand) : On 7 June GeoNet reported that elevated unrest at Ruapehu continued, though at reduced levels. During the previous week volcanic tremor levels had decreased from moderate to weak, and lake water temperatures had declined to 28 degrees Celsius. Weather conditions prevented gas measurement flights during the previous few weeks.

Sabancaya – Peru : Instituto Geofísico del Perú (IGP) reported moderate levels of activity at Sabancaya during 30 May-6 June with a daily average of nine explosions. Gas-and-ash plumes rose as high as 1.5 km above the summit and drifted E and SE. As many as six thermal anomalies originating from the lava dome in the summit crater were identified in satellite data. Minor inflation continued to be detected near Hualca Hualca (4 km N).

Semeru – Eastern Java : PVMBG reported that the eruption at Semeru continued during 1-7 June. A few eruptive events (recorded at 0701 and 0710 on 1 June, and at 1306 on 6 June) produced ash plumes that rose 300-500 m above the summit and drifted N, W, and SW. Occasionally on the other days white plumes rose 100-600 m and drifted in multiple directions.

Semisopochnoi – Aleutian Islands (USA) : AVO reported that low-level eruptive activity at Semisopochnoi’s North Cerberus cone continued during 31 May-6 June. Seismicity remained elevated with intermittent tremor; one explosion was recorded during 31 May-1 June and multiple small explosions were recorded during 4-6 June. Weather clouds mostly prevented satellite and webcam views. Minor ash emissions rising to low heights were visible in webcam images during 6-7 June.

Sheveluch – Central Kamchatka (Russia) : KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 27 May-3 June; explosions, hot avalanches, and lava-dome extrusion continued.

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