The Buenos Aires VAAC reported that weather clouds mostly prevented satellite observations of Bristol Island's Mt. Sourabaya during 1-6 June, though a thermal anomaly was detected during 1-2 and 5-6 June.

Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)

Based on satellite data and information from PVMBG, the Darwin VAAC reported that during 4-6 June ash plumes from Kerinci rose to altitudes of 4.3-4.6 km (14,000-15,000 ft) a.s.l. and drifted NW and N.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

In a special report posted on 1 June, INSIVUMEH reported that activity at Santa María's Santiaguito lava-dome complex remained high. Two strong explosions generated ash plumes that rose as high as 2.4 km above the complex and drifted 30-40 km NE, SE, and SW. During 3-4 June gas-and-ash plumes rose 300 m.

Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)

On 27 May the Vanuatu Geohazards Observatory stated that the Alert Level for Suretamatai was increased to 1 (on a scale of 0-4) because of a change in activity. VGO reminded residents and tourists that areas around the volcano and along the Sulfur River (E flank) were high-risk zones due to potential impacts from volcanic gas emissions.

Source: Vanuatu Meteorology and Geohazards Department (VMGD)

OVSICORI-UNA reported that activity at Turrialba had declined overall since 27 May, though seismicity continued to be dominated by long-period earthquakes and small low-frequency volcanic earthquakes. A small explosion at 0516 on 1 June generated an ash plume that rose 300 m above the vent and, based on wind dispersion models, likely drifted NW. Some residents of Valle Central reported ashfall. Continuous spasmodic tremor that began at 2240 was associated with ash emissions that rose as high as 1 km and drifted N. At 0037 on 2 June an explosion was followed by high-amplitude spasmodic tremor and a dense ash-rich plume that rose 1 km and drifted NNW. Ash emissions continued; at 0520 and 0600 ash plumes rose as high as 2 km and drifted NW, N, and NE. Tremor amplitude decreased at 1240. Afternoon clouds prevented observations of ash emissions. Ashfall was reported in several neighborhoods in San José, including San Rafael de Moravia (31 km WSW), Sabana (38 km WSW), and in Limón, including Buenos Aires (17 km N), and Pococí (45 km N). During 2-3 June ash emissions were sometimes observed rising as high as 1 km and drifted N and NE. Ashfall in areas of Limón continued to be reported. Tremor amplitude began to decline at 0621 on 3 June, and then further declined to low levels at 0330 on 4 June. At dawn on 4 June plumes of water vapor and gas rose 500 m. Degassing and seismicity remained low through 7 June.

Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)

JMA reported that on 3 June explosions at Showa Crater (at Aira Caldera’s Sakurajima volcano) generated an ash plume that rose 1.3 km above the crater rim, and a small pyroclastic flow that traveled 400 m SE. Tephra was ejected 800 m from the crater. A small-scale explosion occurred at Minamidake summit crater that same day; an ash plume rose 1.5 km above the crater rim. The Alert Level remained at 3 (on a 5-level scale).

Source: Japan Meteorological Agency (JMA)

KVERT reported that moderate activity at Alaid continued during 27 May-3 June. Satellite images showed a thermal anomaly over the volcano on 29 May. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

On 27 May the Vanuatu Geohazards Observatory issued a statement reminding residents and visitors that Ambrym remained active; the Alert Level remained at 2 (on a scale of 0-5). Areas deemed hazardous were near and around the active vents (Benbow, Maben-Mbwelesu, Niri-Mbwelesu and Mbwelesu), and in downwind areas prone to ashfall.

Source: Vanuatu Meteorology and Geohazards Department (VMGD)

Based on analyses of satellite imagery and model data, the Darwin VAAC reported that on 2 June ash plumes from Bagana rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted 75 km in multiple directions.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

AVO reported that seismic activity at Cleveland had remained low since explosions were detected in infrasound (pressure sensor) and seismic data on 5 and 10 May. No significant activity had been observed since satellite data confirmed the eruption of a small-volume lava dome within the summit crater on 18 May; weakly elevated surface temperatures detected during 2-3 June were consistent with cooling lava. On 3 June AVO lowered the Level of Concern Color Code to Yellow and the Volcano Alert Level was lowered to Advisory.

Source: US Geological Survey Alaska Volcano Observatory (AVO)

Based on satellite images and wind data, the Washington VAAC reported that on 3 June an ash plume from Colima rose to an altitude of 5.2 km (17,000 ft) a.s.l. and drifted SW.

Source: Washington Volcanic Ash Advisory Center (VAAC)

Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 1 and 3-7 June ash plumes from Dukono rose to altitudes of 2.1-2.4 km (7,000-8,000 ft) a.s.l. and drifted over 55 km in multiple directions.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

HVO reported that during 1-7 June the lava lake continued to rise and fall, circulate, and spatter in Kīlauea's Overlook vent. Two new flows from Puʻu ʻŌʻō Crater's N and E flanks, which began on 24 May, continued to be active within 1.3 km of their respective vents. The June 27th NE-trending lava flow continued to be active within 5.4 km NE of Puʻu ʻŌʻō Crater.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)

KVERT reported that a Strombolian eruption at Klyuchevskoy continued during 27 May-3 June. Satellite and video data showed a lava flow effusing on the SE flank, down the Apakhonchich drainage. Satellite images showed an intense daily thermal anomaly over the volcano. The Aviation Color Code was raised to Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

During 1-7 June there were 94-251 daily emissions from Popocatépetl and as many as four explosions detected daily; some emissions corresponded with increased crater incandescence at night. A series of explosions detected during 1135-2230 on 4 June generated gas-and-steam emissions with minor amounts of ash that rose 1.5 km above the crater and drifted ENE. Some of the explosions ejected incandescent tephra 300 m onto the NE flanks. An explosion on 5 June generated an ash plume that rose 1.5 km and drifted E. Incandescent tephra was ejected 1 km onto the N flank. Between 0354 and 0824 on 6 June continuous explosions formed plumes that rose 1 km and drifted NE. The Alert Level remained at Yellow, Phase Two.

Source: Centro Nacional de Prevencion de Desastres (CENAPRED)

SNET reported that between 1304 and 1430 on 31 May seismic signals at San Miguel increased, and indicated rock fracturing at depth and possible gas-and-ash emissions. Though weather clouds partially covered the volcano, the webcam recorded some pulses of gas emissions. Seismicity decreased the next day.

Source: Servicio Nacional de Estudios Territoriales (SNET)

KVERT reported that during 27 May-3 June lava-dome extrusion onto Sheveluch’s N flank was accompanied by strong fumarolic activity, dome incandescence, ash explosions, and hot avalanches. Satellite images showed an intense thermal anomaly over the dome during 26-29 May. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Based on satellite images and information from PVMBG, the Darwin VAAC reported that during 5-7 June ash plumes from Sinabung rose to altitudes of 3.3-3.9 km (11000-13,000 ft) a.s.l. and drifted SW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Based on satellite images, wind data, and information from PVMBG, the Darwin VAAC reported that during 1-3 June ash plumes from Tengger Caldera's Bromo cone rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted as far as 65 km N and NW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

On 27 May the Vanuatu Geohazards Observatory stated that the Alert Level for Yasur remained at 2 (on a scale of 0-4) and that explosions continued to be intense. VGO reminded residents and tourists that hazardous areas were near and around the volcanic crater, and that volcanic ash and gas could reach areas impacted by trade winds.

Source: Vanuatu Meteorology and Geohazards Department (VMGD)