KVERT reported that a daily thermal anomaly over Bezymianny was identified in satellite images during 31 May-6 June. According to the Tokyo VAAC an ash plume was identified in satellite images at 1350 (local time) on 5 June rising to 5.5 km (18,000 ft) a.s.l. and drifting E. The ash plume had dissipated by 1720 (local time). Dates are UTC; specific events are in local time where noted.

Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)

PVMBG reported that the eruption at Ibu continued during 5-11 June with occurrences of tall ash plumes. White, gray, and black ash plumes rose as high as 5 km above the crater rim and drifted in multiple directions during 5-6 and 9 June. White steam-and-gas plumes rose 200-1,000 m above the crater rim and drifted in multiple directions during on 29 May and 3 June. White-and-gray ash plumes rose as high as 4 km and drifted in multiple directions on 11 June. The Alert Level remained at 4 (the highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 7 km away from the N crater wall opening.

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

PHIVOLCS reported that intense rain on 6 June mobilized ash deposited during the 3 June eruption at Kanlaon causing lahars to descend the S flank and impact local communities. The lahars began at around 1300 and lasted 25 minutes based on seismic data. They deposited cohesive gray mud, plant debris, and gravel in at least four stream channels including Tamburong Creek, which courses through Biak-na-bato and Calapnagan, La Castellana; Intiguiwan River in Guinpanaan and upstream Baji-Baji Falls in Cabacungan, La Castellana; Padudusan Falls, Masulog, Canlaon City; and the Binalbagan River, which drains the S flank of the volcano. Lahars overflowed parts of Tamburong Creek and deposited material a few centimeters thick along a section of the main road in Biak-na-Bato, making it impassable to motorists. Thunderstorms continued and channel-confined lahars on the S and W flank were detected the next day. The lahars began at around 1450 on 7 June and lasted 80 minutes based on seismic data. They were described as cohesive and cement-like and carried tree debris along the Baji-Baji Falls and Ibid Creek, in Cabacungan, La Castellana. Lahars also descended the Santo Guintubdan, Ara-al, La Carlota City and muddy waters were observed in the Buslugan, Busay Oro, Busay Abaga, Busay Mayor, Busay Kapid, Kabkaban, Ezzy, Busay Ambon, and Labi Labi falls. Voluminous gas-and-steam emissions rose 1.5-2 km above the summit and drifted NE and SW during 6-8 June.

A special notice was issued on 8 June due to elevated sulfur dioxide levels. During a field survey sulfur dioxide flux averaged of 4,397 tonnes per day (t/d) which was the highest level recorded so far this year and the second highest land-based measurement for Kanlaon. Sulfur dioxide emissions were elevated in 2024, averaging 1,458 t/d, though after the 3 June eruption the daily average increased to 3,347 t/d. Emisisons had decreased on 9 June, averaging 3,304 t/d. The rate of volcanic earthquakes persisted at above-background levels with an average of 33 events per day. Moderate steam-and-gas emissions rose 300-500 m above the summit and drifted NE and SW during 9-11 June. At least 1,237 families or 4,190 residents of five barangays remained in evacuation shelters according to a 12 June news article; many had health problems from exposure to sulfur dioxide gas and ash. The Alert Level remained at 2 (on a scale of 0-5) and PHIVOLCS reminded the public to remain outside of the 4-km-radius Permanent Danger Zone.

Sources: Philippine Institute of Volcanology and Seismology (PHIVOLCS), The Philippine Star

HVO lowered the Volcano Alert Level for Kilauea to Advisory and the Aviation Color Code to Yellow on 5 June, noting that the fissure eruption that had occurred in a remote area along the Southwest Rift Zone on 3 June was unlikely to restart. Tremor, degassing, and incandescence associated with the fissure vents had substantially decreased. A sulfur dioxide emission rate of 5,500 tonnes per day (t/d) was measured at the eruption site on 4 June, well above background levels (100 t/d or less). Sulfur dioxide emissions decreased to 400 t/d on 6 June and likely continued to decline over subsequent days. Lava flows only covered about 350,000 square meters (0.35 square kilometers). Incandescence from the flow field was visible in webcam images, but decreased daily and was no longer visible by 10 June.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)

PVMBG reported that eruptive activity at Lewotobi’s Laki-laki volcano increased during 26 May-9 June. Eruptive activity increased daily, and ash-and-steam plumes became taller, rising 100-900 m above the summit on average and drifting in multiple directions; dense ash emissions rose 1-1.1 km above them summit on 5 and 9 June. The number of volcanic earthquakes as well as earthquake signals indicating eruptive events and avalanches significantly increased. PVMBG noted that there was also a significant increase in other types of seismic signals, though those increases were unrelated to the eruption; repairs and changes to the seismic network resulted in better detection of seismic signals. Incandescence at the summit was visible in a 5 June webcam image, and Strombolian activity was periodically visible on 9 June. At 0900 on 10 June the Alert Level was raised to 3 (the second lowest level on a scale of 1-4) and the public was warned to stay outside of the exclusion zone, defined as a 3-km radius around Laki-laki crater, 4 km to the NNE, and 5 km on the NE flanks. Strombolian activity continued on 10 June and several ash emissions rose 600-1,000 m above the summit. Gray ash emissions rose 300-600 m above the summit and drifted SW and W on 11 June.

The lava flows on the NE flank advanced 20 m during 29 February-9 April to a total length of 4.34 km; the advancement was due to gravitational forces and not eruptive activity, and no additional advancement had been recorded since.

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

IMO reported that the eruption that began on 29 May near Sundhnúk, NE of Sýlingarfell, within the Reykanes volcanic system, continued through 11 June. The lava field had an estimated area of 8.6 square kilometers and the erupted volume was about 36 million cubic meters based on a 3 June drone survey. The estimated flow rate during 29 May-3 June was 30 cubic meters per second. Only one crater was active by the morning of 4 June, and the flow rate had likely decreased. Lava flows advanced NW towards Sýlingarfell and S towards Hagafell on 5 June. On 7 June flows continued to advance N towards Sýlingarfell, causing the flow field in that area to thicken, and continued on expand N and W. Deformation data indicated that deflation had ceased. A small collapse of the crater wall was visible according to a news source. The rate of lava advancement increased during 7-8 June in an area N of Sýlingarfell, towards Grindavíkurvegur. By 1030 on 8 June lava had crossed Grindavík road just to the N of where work was being done to close a gap in an earthen barrier. Lava also moved along the barrier and in some areas flowed over the top. The flows had slowed by noon, reaching 800 m from hot water pipelines. Inflation began to be detected sometime during 8-9 June though the rate of uplift had not been determined. The eruption continued during 9-11 June. Lava continued to accumulate in a lava pond just SE of Sýlingarfell. Notable sulfur dioxide pollution from the eruption was measured in many parts of Reykjavík and in the W part of South Iceland. Vog was noticeable in the W part of the country during the morning of 11 June.

Sources: Icelandic Meteorological Office (IMO), Icelandic National Broadcasting Service (RUV)

The Washington VAAC reported that ash plumes from San Cristóbal were visible in webcam images at around 1500 and 1700 on 7 June rising above the summit and drifting N. The plumes were not identified in satellite images due to weather conditions. According to a news report the ash plume rose 1 km above the summit.

Sources: Washington Volcanic Ash Advisory Center (VAAC), Centinela35

In a special report, PHIVOLCS noted that sulfur dioxide emissions were elevated at Taal, averaging 11,072 tonnes per day (t/d) on 6 June. Sulfur dioxide emissions have been continuously released since 2021 and averaged 8,294 t/d during 2024. Hazy or voggy conditions were reported at Alitagtag, Tingloy, San Nicolas, Laurel, Taysan, Lobo, and Batangas City, and were observed during field surveys in Agoncillo, Lemery, Taal, Santa Teresita, Alitagtag, Cuenca, Lipa, Balete, and Malvar.

Daily steam-and-gas emissions that were sometimes voluminous rose 1.9-2.4 km above the rim of Main Crater and drifted NNW, NW, SW, and SSE based on webcam images during 6-11 June. Two volcanic earthquakes were recorded during the week. During 7-8 June there were five periods of volcanic tremor lasting as short as three minutes and as long as 10 hours and eight minutes. A two-minute phreatic event was also recorded. Upwelling gases and hot fluids in the lake were observed during 8-10 June. Sulfur dioxide emissions averaged 2,470 t/d on 10 June. The Alert Level remained at 1 (on a scale of 0-5), and PHIVOLCS reminded the public that the entire Taal Volcano Island was a Permanent Danger Zone (PDZ) and to take extra precaution around Main Crater and along the Daang Kastila fissure.

Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)