Volcanic activity worldwide 20 Feb 2025: Santiaguito volcano, Popocatépetl, Semeru, Ibu, Svartsengi…

Map of today’s active volcanoes

Svartsengi (Reykjanes peninsula, SW Iceland): (20 Feb) Deformation measurements indicate the ongoing ground swell, though the rate has slightly decreased in recent weeks. Updated model calculations suggest that magma accumulation is approaching the median volume typically required to initiate a dike intrusion or a potential eruption. Based on these measurements, model assessments, and insights from past events at the Sundhnúksgígar crater row, the likelihood of an event occurring in the coming days or weeks continues to rise.
The seismic activity at the Sundhnúksgígar crater row has remained consistent over the past week, with approximately five or fewer earthquakes recorded daily. However, seismic activity in the region has been gradually increasing since late January.
Source: Icelandic Met Office volcano activity update 20 February 2025

Sakurajima (Kyushu, Japan): (20 Feb) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Tokyo warned about a volcanic ash plume that rose up to estimated 7000 ft (2100 m) altitude or flight level 070 .
The full report is as follows: ERUPTED AT 20250220/0050Z FL070 EXTD SE OBS VA DTG:20/0130Z to 7000 ft (2100 m)

Ibu (Halmahera, Indonesia): Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: INTERMITTENT DISCRETE VA EMISSIONS TO FL080 OBS AT 20/0159Z

Lewotolo (Lesser Sunda Islands): (20 Feb) Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: GROUND REPORT OF ERUPTION AT 19/1301Z EST VA DTG:20/0140Z

Semeru (East Java, Indonesia): Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: VA ERUPTION LAST REPORTED AT 20/1519Z EST VA DTG:20/1620Z

Kilauea (Hawai’i): Lava fountains returned to the Halemaʻumaʻu crater floor’s north vent.
On 19 February at 08:22 PM local time, the 10th effusive commenced with a small spattering, which gradually raised to form spectacular, dome-shaped fire fountains, some lava jest surpassed 90-125 meters (300-400 ft) in height.
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It triggered multiple lava flows which continue even at the time of this update.
A seismic tremor peaked at 10:25 local time, and instruments recorded a ground uplift transition from inflation to deflation beneath Halemaʻumaʻu crater.

Spurr (Cook Inlet, SW Alaska): (20 Feb) The elevated seismic activity at the volcano continues.
The seismic network has detected numerous small, shallow earthquakes beneath the north side of the summit vent over the past two days.
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On 7 February, a reconnsainnace flight was taken by volcanologists to measure a temperature of fumaroles at the summit using so-called forward-looking infrared camera (FLIR). The results showed temperatures exceeding 320 degrees F (160 degrees C).
The Alaska Volcano Observatory continues to monitor Mount Spurr for any signs indicating increased volcanic activity. Based on past eruptions, noticeable changes in earthquakes, ground deformation, the summit lake, and fumaroles would be expected if magma were to rise closer to the surface. Therefore, if an eruption were imminent, it is highly likely that additional warning signals would appear, allowing for advance notice.

Popocatépetl (Central Mexico): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 20000 ft (6100 m) altitude or flight level 200 .
The full report is as follows: VA EMS OBSD to 20000 ft (6100 m)

Santiaguito (Guatemala): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 14000 ft (4300 m) altitude or flight level 140 .
The full report is as follows: VA EMS PSBLY CONTG. to 14000 ft (4300 m)

Nevado del Ruiz (Colombia): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: NEW VA EMS

Reventador (Ecuador): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 14000 ft (4300 m) altitude or flight level 140 .
The full report is as follows: VA EMS REPORTED to 14000 ft (4300 m)

A graph plot depicts the evolution of magma accumulation beneath the Svartsengi region, indicating the volume before the ground uplift in late Octobert 2023. The magma volume beneath Svartsengi has now exceeded 90% of the amount that had accumulated before the eruption on November 20 of last year (image: Icelandic Met Office)