Ahyi (United States) - Report for 10 January-16 January 2024 - NEW

-
Jan 17, 2024

Signs of unrest at Ahyi Seamount were observed during the previous few weeks. Plumes of discolored water drifting as far as 10 km from the vent were identified in satellite data on 24 December 2023 and again on 4 and 10 January 2024. Hydroacoustic arrays located on Wake Island did not record any significant signals, though submarine plumes have been observed in the past without clear hydroacoustic evidence. The Aviation Color Code was raised to Yellow (the second level on a four-color scale) and the Volcano Alert Level was raised to Advisory (the second level on a four-level scale) on 14 January because the likelihood of an eruption had increased. No unusual activity observed in satellite data during 15-17 January.

Source: US Geological Survey

 Read full story.

Ambrym (Vanuatu) - Report for 10 January-16 January 2024 - NEW

-
Jan 17, 2024

The Vanuatu Meteorology and Geo-Hazards Department (VMGD) reported that at 2217 on 13 January an eruption began at Ambrym?s Benbow Crater based on webcam and seismic data. The eruption was characterized by a loud explosion, intense incandescence at the crater, and gas-and-steam emissions. The Alert Level was raised from 1 to 3 (on a scale of 0-5) and the public to stay 2 km away from Benbow Crater and 4 km away from Marum Crater, and additionally to stay 500 m away from the ground cracks created by the December 2018 eruption. Sulfur dioxide emissions measured using satellite data were 1,116 tons per day on 14 January. Activity decreased during 15-17 January based on webcam images, seismic data, and field observations. Gas, steam, and ash emissions had decreased, and crater incandescence was dim or not visible at all. The Alert Level was lowered to 2 on 17 January.

Source: Vanuatu Meteorology and Geohazards Department (VMGD)

 Read full story.

Grimsvotn (Iceland) - Report for 10 January-16 January 2024 - NEW

-
Jan 17, 2024

IMO reported that at 0653 on 11 January a M 4.3 earthquake occurred at Grmsvtn and was the largest earthquake recorded at the volcano since measurements started in 1991. A gradual increase in tremor was recorded at Mt. Grmsfjall, which rises about 300 m above the flat ice shelf over the subglacial lake, since 7 January and the water level in the Ggjukvsl River began to rise on 10 January. IMO noted that a jkulhlaup had likely begun and that the earthquake was in response to pressure release from the flood. The Aviation Color Code was raised to Yellow (the second level on a four-color scale) reflecting the slight increase in the likelihood of an eruption being triggered by the flood. IMO noted that the last eruption was in 2004; since then, 12 jkulhlaups had occurred with no eruptions. Water levels in the Ggjukvsl River steadily and significantly increased during 11-12 January and the river widened; the river rose 70 cm based on data from a stream gauge at the bridge crossing Highway 1. The water level stabilized during 13-14 January, signifying that it had reached peak flow, and was then expected to subside. Around midnight on 15 January the seismometer at Grmsfjall began recording increased tremor, which was likely due to increased geothermal activity and is commonly observed at the end of a jkulhlaup.

Source: Icelandic Meteorological Office (IMO)

 Read full story.

Lewotobi (Indonesia) - Report for 10 January-16 January 2024 - NEW

-
Jan 17, 2024

PVMBG reported that the eruption at Lewotobi?s Laki-laki volcano was ongoing during 10-16 January. Dense white-and-gray or white, gray, and brown ash plumes rose as high as 2 km above the summit and drifted N and NE. Lava flows from the summit crater continued to advance down the N flank and were about 2 km long by 11 January. Rumbling was reported on 13 January. On 14 January as many as four pyroclastic flows traveled up to 1 km down the NE, N, and NNW flanks and lava avalanches traveled 1.5-2 km down the NE flank, according to news articles. Incandescent avalanches of material and accompanying pyroclastic flows traveled as far as 1.5 km N on 15 January. Incandescent avalanches also traveled 2-3 km NE and 1 km NNE. The exclusion zone was increased to 5 km from the Laki-laki Crater and 6 km from the crater on the N and NE flanks during the evening of 16 January. The Alert Level remained at 4 (the highest level on a scale of 1-4).

Sources: Antara News,Antara News,Antara News,Antara News,Antara News,Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

 Read full story.

Marapi (Indonesia) - Report for 10 January-16 January 2024 - NEW

-
Jan 17, 2024

PVMBG reported that eruptive activity at Marapi (on Sumatra) was ongoing at Verbeek Crater during 10-16 January. Dense, white-and-gray ash plumes rose as high as 1.5 km above the summit and drifted NW, W, and SW during 11-15 January. Weather conditions sometimes prevented views of the volcano. The Alert Level remained at 3 (on a scale of 1-4), and the public was warned to stay 4.5 km away from Verbeek Crater.

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

 Read full story.

Reykjanes (Iceland) - Report for 10 January-16 January 2024 - NEW

-
Jan 17, 2024

IMO reported that a seismic swarm began near the older Sundhnkaggar crater row on the Reykjanes peninsula around 0230 on 14 January. Both GPS data and borehole pressure readings indicated that magma was moving. IMO raised the Aviation Color Code to Orange (the third level on a four-color scale), noting an increased likelihood of an eruption. The locations of the earthquakes shifted towards the town of Grindavk where, according to Almannavarnadeild rkislgreglustjra (National Commissioner of the Icelandic Police and Department of Civil Protection and Emergency Management), evacuations started around 0300. A fissure eruption began at around 0757 just N of Grindavk, SE of Hagafell, and was visible on webcams. The Aviation Color Code was raised to Red, but then lowered back to Orange at 0826 because no ash was detected in radar data. A Coast Guard helicopter was dispatched to investigate the eruption site. A NE-SW-trending fissure was visible and notably lengthened within about 10 minutes according to a news article. The fissure grew to about 900 m long and crossed through the eastern part of a curving E-W-oriented earthen berm built to deflect lava flows away from the town. Lava fountaining occurred along the length of the fissure. Lava spread perpendicular from the fissure and to the SW, covering the E half of the berm, though the longest flow traveled WSW along the berm and away from the town. Construction workers managed to reach their heavy equipment that was being used to build the berm and drive them to safety away from the lava flows. Lava covered part of Grindavkurvegur road and overtopped a small area of the berm at the road, flowing S. A shorter second fissure that was about 100 m long opened at 1210 on 14 January to the SW of the first and S of the berm, about 200 m from the Efrahpi neighborhood in Grindavk. Lava flows traveled S, entering the town and setting at least three houses on fire. This fissure was no longer active by 1640 on 15 January and the effusion rate at the larger, main fissure had decreased. Seismicity and the rate of deformation had also decreased, though deformation near the S part of the magmatic dike near Grindavk continued to be detected. Displacement within the town was as high as 1.4 m during 14-15 January; ground cracks had developed, and existing ones had expanded. Thermal images from a 15 January drone flight indicated that previously mapped fissures SW of Grindavk had significantly enlarged. Lava effusion at the longer fissure was concentrated at two of four main vents. Lava effusion at the main fissure ceased around 0100 on 16 January. Seismicity continued to decrease, though event locations indicated that magma movement continued. Most of the seismic activity was concentrated near Hagafell, close to the main fissure. IMO lowered the Aviation Color Code to Yellow at 2105, noting the ongoing decline of seismicity. A man working on filling cracks in Grindavk fell into one of the cracks on 10 January and was unable to be located. Hundreds of rescue workers searched for the man but due to unsafe conditions and landslides occurring inside the crack the search was stopped on 12 January.

Sources: Almannavarnadeild rkislgreglustjra (National Commissioner of the Icelandic Police and Department of Civil Protection and Emergency Management),Icelandic Meteorological Office (IMO),Icelandic National Broadcasting Service (RUV),Independent

 Read full story.

Aira (Japan) - Report for 10 January-16 January 2024

-
Jan 17, 2024

JMA reported ongoing eruptive activity at Minamidake Crater (Aira Caldera?s Sakurajima volcano) during 8-15 January with incandescence at the crater observed nightly. An explosion at 1552 on 9 January produced an ash plume that rose as high as 1.2 km above the crater rim and drifted E and SE. Small eruptive events were occasionally recorded during 12-15 January. The Alert Level remained at 3 (on a 5-level scale), and the public was warned to stay 2 km away from both craters.

Source: Japan Meteorological Agency (JMA)

 Read full story.

Bulusan (Philippines) - Report for 10 January-16 January 2024

-
Jan 17, 2024

PHIVOLCS reported increased seismicity at Bulusan in a special advisory. From 0500 on 11 January to 1000 on 11 January the seismic network recorded a total of 71 volcanic-tectonic earthquakes associated with rock fracturing. The earthquakes were located at depths of 1-6 km beneath the S flank. The largest event was a M 2.2. Diffuse gas plumes rose from the summit crater and drifted W and SE. The Alert Level remained at 1 (the second level on a scale of 0-5) and PHIVOLCS reminded the public not to enter the 4-km-radius Permanent Danger Zone (PDZ) and to be vigilant within the 2-km Extended Danger Zone (EDZ) on the SE flank.

Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)

 Read full story.

Dukono (Indonesia) - Report for 10 January-16 January 2024

-
Jan 17, 2024

PVMBG reported that the eruption at Dukono was ongoing during 10-16 January. Gray-and-white ash plumes generally rose 100-700 m above the summit and drifted S during 10-15 January; emissions were not observed on 11 January. White-and-gray ash plumes rose to 1.7 km above the summit and drifted SW on 16 January. The Alert Level remained at Level 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km exclusion zone.

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

 Read full story.

Ebeko (Russia) - Report for 10 January-16 January 2024

-
Jan 17, 2024

KVERT reported that moderate explosive activity was ongoing at Ebeko during 4-11 January. According to volcanologists in Severo-Kurilsk (Paramushir Island, about 7 km E), explosions on 6, 8, and 9 January generated ash plumes that rose as high as 2.5 km (8,200 ft) a.s.l and drifted SE and NW. The Aviation Color Code remained at Orange (the third level on a four-color scale). Dates are UTC; specific events are in local time where noted.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

 Read full story.
The type of feed: 
generic_parser
URL of your feed: 
http://volcano.si.edu/news/WeeklyVolcanoRSS.xml
Block Title: 
GVP Eruption Reports
Number of items to display: 
10