Mike Cassidy

Great to hear Erik- always liked your writings!

If the Volcanic Eruption Doesn’t Scare You, the Mudflow Should

Really cool summary of a recent paper in Geology (gift link 🎁): www.nytimes.com/2026/01/16/s...

Campi Flegrei and Vesuvius in the Bay of Naples area are extremely hazardous. Millions of people live in or near restless volcanoes. Not sure if we're looking at a catastrophic eruption in our lifetime, but a repeat of 1538 Monte Nuovo would still be dramatic.

New study found the largest lahar of the last millennium occurred at Mt Rainier (4.392 m, WA) at the end of the year 1507! 🏔️🌊⌚

Wonderful tree rings... 🥰🌲💍

pubs.geoscienceworld.org/gsa/geology/...

This is a must read.

A point that resonates with me: the hubris of administrators to decide what is worthy of a degree.

You want to create a school where students can study climate change, yet you plan to fire all the geographers, paleontologists, climatologists, and sedimentologists??

It's not the first time a hidden volcano has caught us unawares and it won't be the last. This is why we founded the Global Volcano Risk Alliance @gvra.bsky.social, to improve preparedness, strengthen monitoring and make sure the next “unexpected” eruption doesn’t become a global crisis.

The world’s little-known volcanoes pose the greatest threat In regions like the Pacific, South America and Indonesia, an eruption from a volcano with no recorded history occurs every seven to ten years.

While I was writing an article for the @uk.theconversation.com about why the world's little-known volcanoes may pose the greatest threat, an eruption from a volcano that has had no major documented eruption since the ice age erupted: #HayliGubbi volcano, Ethiopia theconversation.com/the-worlds-l...

Fascinating and timely work on the intrusion that preceded the #HayliGubbi eruption - this will turn out to be a very valuable example for volcanologists!

Eruptions Newsletter Extra for November 23, 2025 Unexpected eruption from Hayli Gubbi in Ethiopia.

I whipped up a new post/newsletter extra for the Hayli Gubbi eruption. First time I've had to post an extra edition! #volcano #eruption eruptions.beehiiv.com/p/eruptions-...

Multiple minor eruptions rock Taal Volcano on Oct. 26 YouTube video by Manila Bulletin

#volcan #volcano #Taal 🇵🇭 Des explosions phréatiques ou préatomagmatiques parfois assez spectaculaires sont observées dans le lac/Some relatively impressive phreatic or phreatomagmatic explosions are observed in the lake www.youtube.com/watch?v=Enjx...

Proposal for revision of membership fees, salary caps, and donations to IAVCEI During our Meeting of Members in Geneva on 2 July 2025, the Executive Committee (EC) tabled a proposal to revise IAVCEI’s membership fees. There followed a lively and constructive discussion from the…

And another one about ammending membership fees: www.iavceivolcano.org/proposal-for...

An important vote for volcanologists/IAVCEI members that you might have missed (see page 49 in Newsletter), about a "proposal change to allow a president to run for multiple terms of office" Vote here: www.iavceivolcano.org/proposal-cha...

Over the last six weeks, SEES scientists Mengwen, Patrick, Helen & Andrea jointed the Beyond EPICA – Oldest Ice project, which aims to analyse the oldest ice on Earth – up to 1.5 million years old, beyond the 800,000 years previously covered – to understand more about Earth's climate 🧊🧪🥼 @bas.ac.uk

a man in a maroon shirt with the words this is why we dont have nice things ALT: a man in a maroon shirt with the words this is why we dont have nice things

So, no more Smithsonian/USGS Weekly Volcanic Activity Report until the government reopens ...

Extremely offline: what happened when a Pacific island was cut off from the internet | Samanth Subramanian A colossal volcanic eruption in January 2022 ripped apart the underwater cables that connect Tonga to the world – and exposed the fragility of 21st-century life

Great to see @mikeaclare.bsky.social @noc.ac.uk quoted in this piece in the Guardian today www.theguardian.com/news/2025/se... about the Hunga Volcano eruption and the subsequent telecommunications outage in 2022.

Missives - London A crisis unravelling in letters. Many enquiries have tried to ‘learn lessons’ from crises provoked by natural hazards. Often, disaster is rooted in the misfiring communication and stalled decision-mak...

www.beinghumanfestival.org/events/missi...
Volcanic crises! Archives! The ‘real story’ between the lines.

We’re performing a ‘staged reading’ and exploring two crises on #montserrat - with two wonderful playwrights as part of #beinghumanfestival. Come see us in London and also 1/2

New paper alert. Volcanic crisis reveals coupled magma system at Santorini and Kolumbo. Great work led by Marius and Jens, thanks all for working on that together! It can be found in today’s issue of Nature.

www.nature.com/articles/s41...

Yes indeed!

We are advertising for a 3-year "Senior Research Associate in Volcanic Petrology and Stratigraphy". Part of a Leverhulme-funded interdisciplinary research grant "Volcanic Histories", focused on research in the Eastern Caribbean.

Closing: October 15th
www.bristol.ac.uk/jobs/find/de...

PAGES September newsletter is out!
Find out what the 2k Network, CRIAS, Human Traces, PO2, SISAL and VICS working groups are up to, and much more on the paleoscience calendar!

ℹ️ pastglobalchanges.org/news/138628

@pastoxygen.bsky.social

I shared this earlier, but this is *exactly* the point I try to make whenever I get the question about "which volcano will be the next to have a big eruption?" It is rarely the ones that are in the headlines at the time.

Many thanks Cin-Ty!

Thanks David, true on both counts!

Thanks for the kind words Ben!

Thanks Vicky!

Thanks Brendan! Indeed - there's still life in those Aussie volcanoes!

Global Volcano Risk Alliance Photo credit: UWI Seismic Research Centre

We’ve founded the Global Volcano Risk Alliance (@gvra.bsky.social) to prepare for the eruptions that could reshape our world.
If you’d like to support our work: www.globalvolcanoriskalliance.com

Famous names—Yellowstone, Etna, Kīlauea—draw the cameras. But the most dangerous volcanoes may be the “quiet” ones, hidden in jungles or beneath the sea, biding their time.

Yet volcanology is chronically underfunded + uneven.
📊 More papers on Mt St Helens alone (1,437) than all 123 volcanoes in Indonesia combined.
Only ~600 of Earth’s 1,302 active volcanoes have any monitoring instruments.

It’s not that rare:

75% of VEI-5 eruptions (like El Chichón or Mt St Helens) followed 100+ yrs of silence.

90% of VEI-6 eruptions (10x bigger) too.
And in regions like Indonesia or the Pacific, a volcano with no known history erupts every 7–10 yrs.