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Africa
Iceland
Japan
Indonesia (Semeru, Dec. 24, 2025, 170 UTC)
Philippines
New Zealand (Ruapehu, Dec. 17, 2025, 2041 UTC)
Blue Latitudes
US
Mexico (Popocatépetl, Dec. 23, 2025, 1530 UTC)
Caribbean
Central America
South America
Europe (Etna, Dec. 28, 2025, 0116 UTC)
Kamchatka
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This is by no means comprehensive: for that, the Smithsonian’s Global Volcanism Program website is an excellent and authoritative source. They also put out a weekly list of all reported volcanic activity.
On a lay level, Volcano Discovery is just one of the good sites out there that try to cover all restless volcanoes (mention does not mean endorsement of them; I have no connection whatsover with Volcano Discovery or with anyone associated with it).
Another good central source of updates is Volcano News over at the Volcano Earth blog.
Rather, this post centralizes information on the active volcanoes that I have blogged about. Volcanism, unlike weather, evolves slowly, and so, many updates are needed all the time.
A single post about restless volcanoes is easier and neater than pinning multiple posts to the top of the front page. (Some erupting fire mountains will get pinned posts, particular those that are high risk — near population centers, infrastructure, tsunami threat, etc.)
Links to the posts about volcanoes that interest me are below, along with the date and time of the most recent update.
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Africa
DR Congo/Rwanda
December 3, 2025, 1502 UTC: As far as I can tell, both volcanoes continue to be active. The sociopolitical situation on the ground prevents close-up monitoring.
TROPOMI SO2 frequently tweets notifications of increased emissions that occasionally are hefty — this layperson’s guess is that they come from Nyamulagira, although Nyiragongo still has a lava lake.
Per the GVP:
Most Recent Weekly Report: 17 September-23 September 2025
The eruption at Nyamulagira continued during 3-18 September. Incandescence on the floor of the summit caldera and from active lava flows on the W and NW flanks was visible in satellite images on 3, 8, 13, and 18 September. Weather clouds obscured parts of the summit area and the flanks in all four images.
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Ethiopia
- Erta Ale volcanic range (includes Fentale, Hayli Gubbi)
December 3, 2025: See the linked post.
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Iceland
- Latest Reykjanes eruption (See also “Iceland” under Categories in the menu)
- Askja
- Bardarbunga
- Eyjafjallajokull
Link is to the Catalogue of Icelandic Volcanoes entry, where they will also put updates (it’s quiet now but included here because of the recent trouble-causing eruption earlier this century). Here is the GVP page.
Correction: On looking through the knowledgeable but unofficial Jon Frimann’s blog, I found this post: it has been a little restless thus far in 2025!
- Grimsvotn
- Hekla
Link is to the Catalogue of Icelandic Volcanoes entry. Hekla needs a post, since reportedly it could erupt at any time.
In other reading this summer I learned that Hekla tends to wake up with little warning and in a plinian-style mood. The boffins recommend that you bring your cellphone with you when you explore Hekla, just in case an early-warning alert is issued. Seconds might count!
- Hofsjokull
- Ljosufjoll
- The older Other restless volcanoes post
December 3, 2025, 1515 UTC: Here is the current IMO update via Google Translate (scroll down for earlier updates; they also have an English-language site:
…Updated 25.11.2025
Key points
• The rate of magma accumulation under Svartsengi has remained fairly constant over the past two weeks.
• The likelihood of magma flow and volcanic eruption continues to increase in the coming weeks.
• The uncertainty about the timing of the next eruption is running out in a few months
• The risk assessment remains unchanged until December 9, unless there are changes to the activity.
• Estimation of the probability of a new magma flow and volcanic eruption based on model calculations
Landslides [GT’s translation of the Icelandic word(s) for seismicity] and magma accumulation under Svartsengi continue. The rate of magma accumulation has remained fairly constant over the past two weeks. Model calculations estimate that between 16 and 17 million cubic meters of magma have accumulated under Svartsengi since the last eruption in July.
The amount of magma that flowed from Svartsengi into the Sundhnúk crater range in the eruption that began on July 16 was estimated to be around 11 – 13 million m 3 . Based on experience with eruptions in the Sundhnúk crater range, it is expected that the likelihood of a new magma flow and eruption will increase when approximately the same amount of magma has accumulated under Svartsengi as flowed from there in the previous event.
In early October, model calculations showed that about 11 million m3 of magma had again been added to the accumulation area under Svartsengi. This began a period, which is still ongoing, in which an increased probability of a new magma flow and eruption must be expected.
Slower rate of magma accumulation increases uncertainty in timing of next event
In the run-up to the eruptions that have occurred at the Sundhnúk crater series, the rate of magma accumulation has varied. The magma inflow into the accumulation area under Svartsengi is currently estimated at 1 m 3 /s, but looking at recent eruptions, model calculations show that the rate of inflow has gradually decreased with each eruption. The slower the magma accumulation, the more difficult it is to estimate the timing of the next eruption. Based on current knowledge of the events at the Sundhnúk crater series, it is not possible to estimate with precision when the next eruption will occur, except with an uncertainty of several months.
Experience from recent events has also shown that the rate of accretion does not need to change much to shift the timing of the next possible eruption by a few weeks. The uncertainty in the timing of the next event is therefore considerable and the current magma accretion period could be prolonged.
Looking at eruptions in the Sundhnúk crater series since March 2024, it can be seen that the amount of magma that needs to accumulate again under Svartsengi to trigger a new magma flow has been at most 23 million m 3 . If it is estimated that this amount needs to be reached to trigger a new magma flow, that volume will be reached in early February 2026, if the rate of magma accumulation remains unchanged, as can be seen in the following graph showing the development of magma accumulation under Svartsengi since the last eruption in the Sundhnúk crater series.
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Seismic activity at Svartsengi and Krýsuvík
Low seismic activity continues to be measured at Svartsengi and Grindavík. Seismic activity at Krýsuvík continues to decrease and deformation measurements show that subsidence at Krýsuvík has more or less stopped.
Risk assessment
The hazard assessment map has been updated and will remain unchanged until December 9, when a new scientific consultation meeting will be held. The Icelandic Meteorological Office is closely monitoring developments and will update the assessment if there are changes in activity…
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Japan
- Aso
- Fuji
This will do for now, as Fujisan is under no increased alert, but it needs a better page.
- Kirishimayama (including Shinmoedake)
- Sakurajima
- Suwanosejima
- Tokara Islands
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Indonesia
- Krakatoa, Sunda Strait
- Lewotobi, Flores Island
- MArapi, Sumatra; link is to GVP page. This very active volcano needs a post.
- MErapi, Java
- Semeru. (December 24, 2025, 1710 UTC)
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Philippines
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New Zealand
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The Blue Latitudes
- American Samoa.
Things have been quiet here since 2022, but I did that post back then and so updated it.
The USGS also keeps an eye on Marianas volcanism (because), and in November 2025 they reported that Ahyi Seamount is restless.
- Bagana, Bougainville, Papua New Guinea
- Hunga Tonga-Hunga Ha’apai, Tonga
- Ulawun, New Britain Island, Papua New Guinea
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North America
🇺🇲
US, Hawaii
US, Alaska
This is by no means complete — for a list of all restless Alaskan volcanoes, check out the Alaska Volcano Observatory (AVO) page and its links.
- Great Sitkin
- Mount Edgecumbe. That is the AVO age. This isn’t kicking up trouble right now but probably should get a blog post for updates.
US, Lower Forty-Eight
- Axial Seamount, Oregon; link is to GVP page; this harmless submarine volcano needs a post to counter all the unfactual sensationalism out there.
- Mount Adams, Washington
- Mount Rainier, Washington. Link is to Cascades Volcano Observatory (CVO) page; Rainier is mostly quiet other than a little seismic swarm now and then, but it needs a post for updates.
- Newberry, Oregon; link is to CVO page; I need to redo that post.
- Three Sisters, Oregon; link is to CVO page; I should probably do a post on this mildly restless group, but it will have to wait until after I’ve re-tackled the topic of Yellowstone and the High Lava Plains (this is true for Newberry, too).
- Yellowstone. Just acting normally, but everyone will wonder. Link is to the Yellowstone Volcano Observatory website, which is full of goodies! They also cover Valles Caldera, which is quiet, and assorted other western US active volcanoes. CALVO can give you information on all California volcanoes, which all are sleeping, too. The Cascades Volcano Observatory is your online source for Pacific Northwest fire mountains.
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Mexico
- Chichinautzin volcanic field. Link is to GVP page, which has no recent activity reports. However, because it is so close to Mexico City, people are concerned occasionally. Because of that proximity it is also worth a mention here, just in case.
- Popocatépetl (Dec. 23, 1530 UTC)
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Caribbean
- Kick-’em-Jenny
- Mount Pelee, France, Martinique
- Soufriere Hiils, UK, Montserrat; link is to GVP page; this volcano is currently fairly quiet but it devastated the island with its last eruption.
- La Soufriere, UK, St. Vincent.
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Central America
- Fuego, Guatemala
- Pacaya, Guatemala
- Santa Maria/Santiaguito, Guatemala; link is to GVP page; this very active volcanic dome complex needs an update post.
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South America
- Laguna del Maule, Argentina. Link is to GVP, and barring new activity, I might do a post on it when the original VEI 8 series is completed. Whatever might be up with Laguna del Maule at present, it has other eruptions in its history besides a biggie — just like almost all supervolcanoes.
Here is the current GVP update:
Most Recent Weekly Report: 6 August-12 August 2025
On 6 August the Alert Level for Laguna del Maule was raised to Yellow (the second lowest level on a four-color scale) based on data analysis by Servicio Nacional de Geología y Minería (SERNAGEOMIN) and Servicio Nacional de Prevención y Respuesta ante Desastres (SENAPRED). The Servicio Geológico Minero Argentino (SEGEMAR) Observatorio Argentino de Vigilancia Volcánica (OAVV) also raised the Alert Level to Yellow (the second lowest level on a four-color scale). The number of seismic events, notably volcano-tectonic earthquakes, had progressively increased in recent weeks and were mainly located in the E and central parts of the complex. Several swarms were detected; in total, more than 11,000 volcano-tectonic earthquakes were recorded in July. Additionally, the rate of surface deformation had accelerated, reaching high levels. Vertical deformation rates using Global Navigation Satellite System (GNSS) data were 4.2 cm per month at the station located closest to Laguna del Maule lake during mid-May-July. Variations in horizontal displacement were around 2.1 cm/month, a value characterized as high. SENAPRED declared “Early Warning” for San Clemente enabling increased monitoring. The public was warned to stay 2 km away from the center of the activity, in the Troncoso-Nieblas sectors about 5 km SW of the lake’s shore, due to the potential for anomalous carbon dioxide emissions.
- Nevado del Ruiz, Colombia. Link is to the GVP page, and here (Spanish) is the Colombian Geological Service volcanoes page (several are restless, and you might have seen Puracé in the news recently).
Per online translation of their current bulletin (December 2-8, 2025), Ruiz continues its low-level restlessness, currently with a decline in sulfur emissions.
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Europe
- Campi Flegrei, Italy.
- Etna, Italy. (Dec. 28, 2025, 0116 UTC)
- Tenerife (including Teide), Spain, Canary Islands; link is to GVP page; it’s quiet but the seismic swarms need an update page.
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Kamchatka
- Bezymianny
- Klyuchevskoy; link is to GVP page. Klyuchevskoy is currently at Aviation Code Green, per KVERT, but it is frequently active and needs a new blog update page.
- Krasheninnikov
- Sheveluch
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Featured image: ALIF NK/Shutterstock
Flight To Wonder 