Volcanos

Roundup of Global Volcanic Activity – Ongoing Activity for the week 24 August – 30 August 2022

Aira – Kyushu (Japan) : JMA reported low but continuing activity from Minamidake Crater (at Aira Caldera’s Sakurajima volcano) during 22-29 August. Small eruptive events were recorded throughout the week, and nighttime incandescence was visible from the crater was visible during 26-29 August.

Dukono – Halmahera : PVMBG reported that almost daily white plumes from Dukono rose as high as 200 m above the summit and drifted SW, W, and NW. During 27-18 August dense white, gray, and brown ash plumes rose as high as 1 km above the summit and drifted SW and W.

Ebeko – Paramushir Island (Russia) : KVERT reported that moderate activity at Ebeko was ongoing. A thermal anomaly over the volcano was identified in satellite images during 18-19, 22, and 25 August. According to volcanologists in Severo-Kurilsk (Paramushir Island, about 7 km E) explosions generated ash plumes that rose up to 3 km (10,000 ft) a.s.l. during 19 and 22-25 August and drifted N and E.

Erta Ale – Ethiopia : Thermal anomalies of variable intensities at Erta Ale’s N and S pit craters were periodically identified in satellite images during August. On 1 August there were two anomalies in the S pit crater and none in the N pit crater. Images were cloudy on 6 and 11 August. On 16 August two anomalies were again visible in the S pit crater while one large anomaly occupied the N crater. Translucent weather clouds obscured views on 21 August, though two anomalies were visible in the S pit crater. Dense weather clouds covered the N pit crater on 26 August and obscured the S pit crater, though one anomaly was visible.

Great Sitkin – Andreanof Islands (USA) : AVO reported that slow lava effusion at Great Sitkin probably continued during 24-30 August with lava around the vent likely thickening. Weather clouds often obscured satellite and webcam views during most of the week; elevated surface temperatures were occasionally visible. Seismicity was very low.

Karymsky – Eastern Kamchatka (Russia) : KVERT reported that the eruption at Karymsky continued during 18-25 August. A thermal anomaly over the volcano was identified in satellite images during 18-19, 22, and 24-25 August.

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 24-30 August, entering the lava lake and flowing onto the crater floor. Part of the lake was continuously active. The lake level mostly remained within the bounding levees, though daily breakouts were visible along the margins.

Klyuchevskoy – Central Kamchatka (Russia) : Strong winds re-suspended ash from the E flank of Klyuchevskoy and created plumes that were visible in satellite images drifting more than 205 km E during 25-26 August.

Lewotolok – Lembata Island : PVMBG reported that the Strombolian eruption at Lewotolok continued during 23-30 August. Daily white emissions rose as high as 700 m above the summit and drifted in multiple directions. Photos posted with daily reports showed crater incandescence and occasional Strombolian activity.

Merapi – Central Java : BPPTKG reported that the eruption at Merapi continued during 19-25 August. Seismicity intensified compared to the previous week; in particular the number of deep volcanic earthquakes increased and indicated magmatic activity at depths less than 1.5 km. As many as 19 lava avalanches traveled down the Bebeng drainage on the SW flank, reaching a maximum distance of 1.8 km. Photo analyses showed no height changes at the SW and central lava domes, though some changes at the SW dome were observed due to avalanche activity.

Pavlof – Alaska Peninsula, Alaska : AVO reported that a minor eruption at a vent on Pavlof’s upper E flank was ongoing during 23-30 August, though there was no evidence of lava effusion. Seismic tremor persisted. A small ash emission rose to about 4 km (12,000 ft) a.s.l. on 24 August and was seen by passing aircraft. Sulfur dioxide emissions were also detected that same day.

Popocatepetl – Mexico : CENAPRED reported that there were 15-75 steam-and-gas emissions, sometimes containing minor amounts of ash, rising from Popocatépetl each day during 23-30 August. A moderate explosion was detected at 0117 on 30 August. .

Reventador – Ecuador : IG characterized the ongoing eruption at Reventador as moderate during 23-30 August. Gas-and-ash plumes, observed with webcams or reported by the Washington VAAC, rose as high as 1.6 km above the summit and drifted in multiple directions. Crater incandescence was visible on most nights and often during early morning hours. Incandescent blocks were visible rolling 500 m down the NE flank during 24-25 August and 600 m down all flanks during 28-29 August.

Semeru – Eastern Java : PVMBG reported that the eruption at Semeru continued during 23-30 August. Eruptive events at 0735 on 26 August, 0606 and 0628 on 27 August, 0623 on 28 August, and 0618 on 29 August produced ash plumes that rose 500-600 m above the summit and drifted N, W, and SW.

Sheveluch – Central Kamchatka (Russia) : KVERT reported that the ongoing eruption at Sheveluch was characterized by explosions, hot avalanches, and lava-dome extrusion during 18-25 August. A daily thermal anomaly was identified in satellite images during 18-19, 21, and 23-25 August. Ash plumes drifted 190 km SE and 150 km E on 19 and 25 August, respectively.

Suwanosejima – Ryukyu Islands (Japan) : At 2151 on 28 August a large eruptive event at Suwanosejima’s Ontake Crater ejected large bombs 800 m above the vent and produced an eruption plume that rose into overhead weather clouds. Crater incandescence was visible in webcam images overnight. By 0900 on 29 August three more explosions were recorded and produced ash plumes that rose as high as 1.3 km above the vent.

from WordPress https://ift.tt/dSoZckp