Some Restless Volcanoes (March 12, 2026, 0649 UTC; Tambora)


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Africa
Iceland
Japan (Dec. 30, 2025, 1442 UTC, Satsuma/Kikai, Japan)
Indonesia (Tambora, March 12, 2026, 0649 UTC)
Philippines (Mayon, Jan. 8, 2026, 1029 UTC)
New Zealand (Ruapehu, Dec. 17, 2025, 2041 UTC)
Blue Latitudes
US (Pavlof added, Jan. 17, 2026)
Mexico (Popocatรฉpetl, Dec. 23, 2025, 1530 UTC)
Caribbean
Central America
South America
Europe (Tenerife, Feb. 22, 2026, 1258 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

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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

December 3, 2025: See the linked post.


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Iceland

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  • Latest Reykjanes eruption (See also “Iceland” under Categories in the menu)
  • March 6, 2026, 1548 UTC: From the current IMO update via Google Translate (scroll down for earlier updates:

    …Magma has been accumulating under Svartsengi for about 210 days, making this the longest continuous period of magma accumulation since the eruption of the Sundhnรบk crater series began in December 2023.

    If magma accumulation continues at the same rate, it can be expected that next week the amount of magma that has accumulated since the last eruption will be the largest between eruptions since the beginning of the volcanic eruption.

    The large amount of magma and the length of the magma accumulation period call for further review of the possible course of the volcanic activity. The Icelandic Meteorological Office is working on a review of scenarios for possible course of the activity and these will be presented in the coming weeks. It is important to note that the current long pause in eruption is not a clear indication that the eruption cycle at the Sundhnรบk crater series has ended…

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  • 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

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Japan

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Indonesia

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  • Krakatoa, Sunda Strait
  • Lewotobi, Flores Island
  • MArapi, Sumatra; link is to GVP page. This very active volcano needs a post.
  • MErapi, Java
  • (March 9, 2026, 1652 UTC)

  • Semeru. (December 24, 2025, 1710 UTC)
  • Tambora, Sumbawa (March 11, 2026, 11:49 p.m., Pacific)

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Philippines

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  • Mayon, Luzon (January 8, 2026, 1029 UTC)
  • Taal, Luzon

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New Zealand

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The Blue Latitudes

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North America

๐Ÿ‡บ๐Ÿ‡ฒ

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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 page. This isn’t kicking up trouble right now but probably should get a blog post for updates.
  • Pavlof, Jan. 17, 2026

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

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Caribbean

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Central America

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South America

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  • 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 Geologรญa y Minerรญa (SERNAGEOMIN) and Servicio Nacional de Prevenciรณn y Respuesta ante Desastres (SENAPRED). The Servicio Geolรณgico Minero Argentino (SEGEMAR) Observatorio Argentino de Vigilancia Volcรกnica (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 โ€œEarly Warningโ€ 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 lakeโ€™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 Puracรฉ 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

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  • Campi Flegrei, Italy.
  • Etna, Italy. (Dec. 28, 2025, 0116 UTC)
  • Tenerife (including Teide), Spain, Canary Islands (1258 UTC, February 22, 2026)

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Kamchatka

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Featured image: ALIF NK/Shutterstock


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