Smithsonian / USGS Weekly Volcanic Activity Report
Kuchinoerabujima (Japan) - Report for 12 February-18 February 2020 - NEW
Wed, 19 Feb 2020 01:57:47 -0400

JMA reported that at 1211 on 13 February a very small eruption at Kuchinoerabujima?s Shindake Crater produced a grayish white plume that rose 300 m above the crater rim and drifted NE. The Alert Level remained at 3 (the middle level on a scale of 1-5).

Source: Japan Meteorological Agency (JMA)

Piton de la Fournaise (France) - Report for 12 February-18 February 2020 - NEW
Wed, 19 Feb 2020 01:57:47 -0400

OVPF reported that the longest-travelling lava flow that began to effuse on 10 February from fissures on the E flank of Piton de la Fournaise?s Dolomieu Crater was no longer advancing by 13 February. The end of the longest active flow was located below Marco Crater around 1,900 m elevation, based on field an aerial observations. A cone was building over three vents and had grown to 30 m high; lava fountains from the three vents rose 10-15 m above the rim of the cone. Tremor levels rapidly decreased around 1400 on 15 February, though inclement weather conditions prevented visual confirmation of changes to the surficial activity. Observers noted no activity while aboard an overflight during 0730-0800 on 16 February, though tremor continued to be recorded. By 1412 tremor ceased, signifying the end of lava effusion.

Source: Observatoire Volcanologique du Piton de la Fournaise (OVPF)

Reykjanes (Iceland) - Report for 12 February-18 February 2020 - NEW
Wed, 19 Feb 2020 01:57:47 -0400

On 15 February IMO reported that seismicity at Reykjanes, in an area N of the town of Grindavík, remained above background levels even though activity had been decreasing since the end of January. Two earthquakes larger than M 3 were detected; one of them, an M 3.1, was recorded at 0826 on 14 February. The rate of deformation had slightly increased. The Aviation Code remained at Yellow.

Source: Icelandic Met Office (IMO)

Semisopochnoi (United States) - Report for 12 February-18 February 2020 - NEW
Wed, 19 Feb 2020 01:57:47 -0400

A series of explosions and tremor bursts at Semisopochnoi were detected by the seismic network beginning on 14 February, prompting AVO to raise the Aviation Color Code to Orange and the Volcano Alert Level to Watch. Tremor bursts lasting from three to twelve minutes every few hours were recorded the next day. Ash plumes were not visible, though a weather cloud deck persisted between 1.5 and 4.6 km (5,000 and 15,000 ft) a.s.l. Seismic data continued to record small explosions and tremor bursts lasting from six to ten minutes every few hours on 16 February, but by 17 February there were almost no events recorded. Weather clouds continued to obscure views of the volcano.

Source: US Geological Survey Alaska Volcano Observatory (AVO)

Aira (Japan) - Report for 12 February-18 February 2020
Wed, 19 Feb 2020 01:57:47 -0400

JMA reported that during 10-17 February there were 13 explosions and seven non-explosive eruptive events detected by the Minamidake Crater (at Aira Caldera?s Sakurajima volcano) seismic network. Ash plumes rose as high as 1.4 km above the crater rim and material was ejected 600-900 m away from the crater. Crater incandescence was visible at night. The Alert Level remained at 3 (on a 5-level scale).

Source: Japan Meteorological Agency (JMA)

Asosan (Japan) - Report for 12 February-18 February 2020
Wed, 19 Feb 2020 01:57:47 -0400

JMA reported that eruptive activity at Asosan was recorded during 10-17 February. Ash plumes rose 900-1,300 m above the crater rim and caused ashfall in areas downwind. The sulfur dioxide emission rate continued to be at a high level. The Alert Level remained at 2 (on a scale of 1-5).

Source: Japan Meteorological Agency (JMA)

Dukono (Indonesia) - Report for 12 February-18 February 2020
Wed, 19 Feb 2020 01:57:47 -0400

Based on satellite and wind model data, the Darwin VAAC reported that during 13-17 February ash plumes from Dukono rose to 2.4 km (8,000 ft) a.s.l. and drifted in multiple directions. 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)

Ebeko (Russia) - Report for 12 February-18 February 2020
Wed, 19 Feb 2020 01:57:47 -0400

Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions during 12-13 February that sent ash plumes up to 1.5 km (5,000 ft) a.s.l. Ash plumes drifted E and caused ashfall in Severo-Kurilsk. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Fuego (Guatemala) - Report for 12 February-18 February 2020
Wed, 19 Feb 2020 01:57:47 -0400

INSIVUMEH reported that there were 8-16 explosions per hour recorded at Fuego during 12-18 February, generating ash plumes that rose as high as 1.1 km above the crater rim and generally drifted 10-22 km SW and W. Ashfall was reported in several areas downwind including Santa Sofía (12 km SW), Morelia (9 km SW), Panimaché I and II (8 km SW), Finca Palo Verde, San Pedro Yepocapa (8 km NW), Sangre de Cristo (8 km WSW), El Porvenir (8 km ENE), Alotenángo (8 km ENE), and La Soledad (11 km N). Explosions sometimes produced shock waves that rattled houses in communities within an 8-km radius. Incandescent material was ejected 150-500 m high and caused avalanches of material that occasionally traveled long distances (reaching vegetated areas) down the Seca (W), Taniluyá (SW), Ceniza (SSW), Trinidad (S), Honda, and Las Lajas (SE) ravines. Lava flows in the Ceniza drainage were 700-800 m long during 13-17 February and lengthened to 1.2 km during 17-18 February.

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

Ibu (Indonesia) - Report for 12 February-18 February 2020
Wed, 19 Feb 2020 01:57:47 -0400

PVMBG reported that on 16 February an ash plume from Ibu rose at least 800 m above the summit (6,800 ft a.s.l.) and drifted W. The Darwin VAAC stated that on 17 February an ash plume rose to 2.1 km (7,000 ft) a.s.l. and drifted SE. The Alert Level remained at 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)

Kerinci (Indonesia) - Report for 12 February-18 February 2020
Wed, 19 Feb 2020 01:57:47 -0400

PVMBG reported that at 0600 on 16 February and at 0048 on 17 February brown ash emissions rose 400 m above Kerinci?s summit and drifted SW. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 3-km exclusion zone.

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

Klyuchevskoy (Russia) - Report for 12 February-18 February 2020
Wed, 19 Feb 2020 01:57:47 -0400

KVERT reported that Strombolian activity at Klyuchevskoy was visible during 7-14 February, and a thermal anomaly was identified in satellite images those same days. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Merapi (Indonesia) - Report for 12 February-18 February 2020
Wed, 19 Feb 2020 01:57:47 -0400

PVMBG reported that during 7-12 February white plumes rose as high as 400 m above Merapi?s summit lava dome. The volume of the dome was an estimated 407,000 cubic meters on 12 February based on drone photos, similar to 19 November 2019 measurements. An eruption at 0516 on 13 February lasted two and a half minutes and produced an ash plume that rose about 2 km above the summit and drifted NW. Ashfall was reported in areas within a 10-km radius especially to the S, including the villages of Hargobinangun, Glagaharjo, and Kepuharjo. Video of the event showed incandescent material being ejected above the lava dome and lightning in the ash cloud. The Alert Level remained at 2 (on a scale of 1-4), and residents were warned to stay outside of the 3-km exclusion zone.

Sources: Balai Penyelidikan dan Pengembangan Teknologi Kebencanaan Geologi (BPPTKG),Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

Nishinoshima (Japan) - Report for 12 February-18 February 2020
Wed, 19 Feb 2020 01:57:47 -0400

Based on satellite images and a pilot observation, the Tokyo VAAC reported that on 15 February an ash plume from Nishinoshima rose to 3 km (10,000 ft) a.s.l. and drifted E.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)

Sangay (Ecuador) - Report for 12 February-18 February 2020
Wed, 19 Feb 2020 01:57:47 -0400

IG reported that a permanent monitoring station located near the base of Sangay was repaired during 26 January-1 February and had begun to again transmit data in real time. The technician reported constant ash emissions during the expedition. A high level of activity persisted at Sangay during 12-18 February, though weather clouds often prevented visual confirmation. Ash, steam, and gas plumes rose 570-870 m above the summit and drifted W and SW according to Washington VAAC advisories. A webcam recorded lava blocks descending the SE flank on 17 February.

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)

Sheveluch (Russia) - Report for 12 February-18 February 2020
Wed, 19 Feb 2020 01:57:47 -0400

KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 7-14 February. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Suwanosejima (Japan) - Report for 12 February-18 February 2020
Wed, 19 Feb 2020 01:57:47 -0400

JMA reported that during 7-14 February incandescence from Suwanosejima?s Ontake Crater was visible nightly. Very small eruptions during 9-10 February produced ash plumes that rose 700 m above the crater rim. Rumbling and ashfall was reported in a village 4 km SSW. The Alert Level remained at 2 (on a 5-level scale).

Source: Japan Meteorological Agency (JMA)

Taal (Philippines) - Report for 12 February-18 February 2020
Wed, 19 Feb 2020 01:57:47 -0400

On 14 February PHIVOLCS lowered the Alert Level for Taal to 2 (on a scale of 0-5) noting a decline in the number of volcanic earthquakes, stabilizing ground deformation of the caldera and Volcano Island, and diffuse steam-and-gas emission that continued to rise no higher than 300 m above the main vent during the past three weeks. During 14-18 February sulfur dioxide emissions ranged from values below detectable limits to a high of 58 tonnes per day (on 16 February). According to the Disaster Response Operations Monitoring and Information Center (DROMIC) there were a total of 5,321 people in 21 evacuation centers, and an additional 195,987 people were staying at other locations as of 19 February. PHIVOLCS recommended no entry onto Volcano Island.

Sources: Disaster Response Operations Monitoring and Information Center (DROMIC),Philippine Institute of Volcanology and Seismology (PHIVOLCS)


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