Volcano World

At 1037 on 5 June a phreatic eruption at Bulusan produced a gray steam-rich plume, somewhat visible through weather cloud cover, that rose at least 1 km above the summit and drifted W. The event lasted about 17 minutes and was visible from Juban (Sorsogon Province). Ashfall was reported in Puting Sapa, Aog, Guruyan, Catanusan, Buraburan, Bacolod, and Sangkayon in Juban, and Bolos in Irosin, Sorsogon Province. Residents of Aog, Guruyan, and Catanusan also reported rumbling sounds and a sulfur odor. PHIVOLCS raised the Alert Level to 1 (on a scale of 0-5) and reminded the public not to enter the 4-km-radius Permanent Danger Zone (PDZ) nor the 2 km Extended Danger Zone (EDZ) on the SE flank. After the eruption gas emissions rose from the main crater and, for the first time this year, from the NW summit vent.

Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)

On 2 June IMO reported that the rate of uplift on the Reykjanes Peninsula had significantly decreased, and seismicity had been declining, with only about 150 earthquakes recorded the previous day. The Aviation Color Code was lowered to Green because the data indicated no magma movement.

Source: Icelandic Meteorological Office (IMO)

RVO reported that at 0820 on 2 June a small eruption at Ulawun produced dense gray ash plumes that rose about 3 km above the summit and drifted NW. The elevated activity lasted 10-15 minutes. Minor ashfall was reported in areas downwind, including in Ulamona Mission and on Lolobau Island. Seismicity increased during the event, then dropped back to lower levels. Diffuse white plumes were visible rising from the summit the next day.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC),Rabaul Volcano Observatory (RVO)

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. The Aviation Color Code was raised to Orange (the second highest level on a four-color scale). Dates are based on UTC times; specific events are in local time where noted.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

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. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km exclusion zone.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC),Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

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.

Source: Sezione di Catania - Osservatorio Etneo (INGV)

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. The Aviation Color Code and the Volcano Alert Level remained at Orange and Watch, respectively.

Source: US Geological Survey Alaska Volcano Observatory (AVO)

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. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

KVERT reported that a thermal anomaly over Karymsky was identified in satellite images during 27 May-3 June. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Dates are based on UTC times; specific events are in local time where noted.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

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. The Aviation Color Code and the Volcano Alert Level remained at Orange and Watch, respectively.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)