Volcanos

Roundup of Global Volcanic Activity – New Activity for the week 2 February – 8 February 2022

Ambrym – Vanuatu : On 2 February the Vanuatu Meteorology and Geo-Hazards Department (VMGD) reported that sulfur dioxide gas emissions from Ambrym were detected in satellite images drifting E.

Chikurachki – Paramushir Island (Russia) : KVERT reported that the eruption at Chikurachki that began around 0300 on 31 January was over by 2 February. Explosions generated ash plumes that rose as high as 5 km (16,400 ft) a.s.l. and drifted as far as 255 km W, SW, S, and SE.

Hunga Tonga-Hunga Ha’apai – Tonga Ridge ; On 4 February the Tonga Geological Services (TGS) posted drone footage of the Good Samaritan Beach, located on the NE side of Tongatapu, showing that tsunamis from the 15 January Hunga Tonga-Hunga Ha’apai eruption reached areas at 15 m elevation, 200 m inland. A 6 February post provided details of what happened when tsunamis reached Mango Island (75 km ENE), stating that waves 12 m high went over the church tower, reached 500 m inland, and pushed buildings and structures against the inland wall of trees. Residents fled to an area that was 30 m elevation, 700 m from the coast, and stayed there all night as ash fell. TGS noted that clean-up efforts were continuing on the islands and communications were slowly being restored.

Krakatau – Sunda Strait : PVMBG reported that as many as 10 eruptive events at Anak Krakatau were recorded during 3-5 February, with dense, gray-black ash plumes rising 800-1,000 m above the vent and drifting N, NE, E, and S. Ash emissions were first visible at 1000 on 3 February, and incandescence above the crater was observed at night.

Taal – Luzon (Philippines) : PHIVOLCS reported that unrest at Taal continued during 1-8 February, with persistent low-level background tremor, hot volcanic fluids circulating in the crater lake, and daily gas-and-steam plumes rising as high as 1.5 km above the lake that drifted SW. Sulfur dioxide emissions continued to be elevated, averaging 7,008-7,902 tonnes/day on 2 and 4 February. Each day during 1-3 February the seismic network recorded as many as 152 volcanic earthquakes, 114 low-frequency volcanic earthquakes per day, five hybrid events, and 33 daily episodes of volcanic tremor each lasting 1-2 minutes. One short-lived (two minutes) phreatomagmatic burst recorded at 1555 on 2 February produced a plume that rose 300 m from the lake and drifted SW. Two low-frequency earthquakes were noted during 3-4 February and one volcanic earthquake was recorded during 7-8 February. Tilt, continuous GPS, and InSAR data all indicated that Taal Volcano Island and the Taal region had begun deflating in October 2021.

Villarrica – Central Chile : The Buenos Aires VAAC reported that an ash plume from Villarrica rose 2.7-4.6 km (9,000-15,000 ft) a.s.l. and drifted E at 1050 on 2 February based on webcam images and information from SERNAGEOMIN. By 1130 the ash plume was barely visible in satellite images. Webcam images showed continuous emissions of gas with sporadic puffs of ash that rose as high as 4.9 km (16,000 ft) a.s.l. The puffs of ash were diffuse by 1730, and by 2330 no emissions were visible in webcam and satellite images.

Wolf – Isla Isabela (Galapagos) : IG reported that the eruption at Wolf continued during 1-8 February. Daily thermal alert counts, anywhere from a few to well over two hundred, indicated active and advancing lava flows on the SE flank. Gas emissions were identified in satellite images on most days.

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