Was Puyehue Cordón-Caulle really a VEI-5?

That the question even exist is a bit of an oddity in modern volcanology, after all we have known amply how to take ejecta-depth measurements to create Isopac-maps since 1956, more about that below. The reason that this question has prevailed is that there are anomalies in the numbers proven for the eruption, compared to…

A Green Hawaiian Interlude

A little article while we happily wait for the USGS to confirm that Kilauea is about to sprout a green caldera lake, or not. I normally do not write a lot about Kilauea, the reason for this is that it rarely does anything interesting. But, in 2018 it did quite a lot of interesting things,…

The Forgotten Volcano

A few days ago, I was sipping on a rum and coke as I was flying over Kilimanjaro and the great continental divide ripping East Africa away from the embrace of the rest of Africa. As I did that, I got to ponder the other major tectonic powerhouse, Iceland. People tend to forget or underestimate…

Greip update (June 2019)

After a wonderful series on Krakatau by Albert, a mysterious island by Carl and a seismic “Intermezzo” by Lurking, I have decided to take things back to Iceland for a while. Most of us know Greip by now, and we are going to take another look at it, from a more seismic perspective with some…

Unrest at Torfajökull

  This is just a short piece about mounting unrest along the extension of the Veidivötn Fissure Swarm as it is running through the Torfajökull volcano. Torfajökull has two known magma reservoirs, one on the south east side that is mainly andesite-basalt, and a rhyolite chamber towards the south-west. The current lineament is having the…

Greip: A prequel on instrumentation

This is both an informal start of our series about a promising central proto-volcano, and a story about the problems of sifting through the bewildering number of signals that the instruments yield for us to peruse. Let me start out in the stars. A friend of mine work with SETI, the search for extra-terrestrial signals.…

The Life Aguatic

We got a letter from one of our readers this week pointing out a seismic series near Agua volcano and Ciudad de Antigua in Guatemala. “I’ve been living in Guatemala for a while, staying in Antigua. On April 27, the area around, and on, Agua volcano started to shake. We felt at least 8 quakes…

On the importance of Deep Quacks

Back in early 2011 I was sitting down for a late light evening read of “Lower-crustal earthquakes caused by magma movement beneath Askja volcano on the north Icelandic rift” by Soosalu et al. As I read angels started to sing a glorious hymn as I had an epiphany and my view on how volcanoes operate…

Michio Kaku and the stale dough

Flat earthers believe that the earth is flat, but the rest of us have good reasons to think that we know that it is round. The difference is that they trust in their belief in something, and that we trust the scientific process and the data and theories that it yields. A flat earther stubbornly…

The rise and fall of Anak Krakatau

It was the largest volcanic eruption since the start of the world-wide web. The invention of telegraphy in the 1850’s had made long distance connections instantaneous. It changed the world. Newspapers were the most obvious beneficiaries, being able to bring gossip news from far away places. And in this landscape, Krakatau exploded. 36,000 people died…