The Woolly Mammoth-Sized Eruption Poll – One Year On

It’s been one year, yes one whole year of DNA damage and telomere shortening, since the last poll and we’re all still waiting to see who’s going to go first. We’ve seen activity increase in some areas and decline in others. Will that have swayed your opinion or will you stick to your previous vote…

Lava Lakes – The Great Equilibrium Machine

A while ago Jesper Sandberg asked a question about if Grimsvötn could sprout forth a lava lake. I somewhat sloppily answered that I did not think that it was possible. Jesper then asked why not, and I got somewhat flustered since I did not have a ready answer. I promised to come back with a…

Strong tremor signal detected at Grimsvötn

At 19.03 local time the automatic SIL-system in Iceland picked up a strong tremor signal. When this type of tremor signal is visible in Iceland it is normally associated with either a large jökulhlaup (rapid glacial melt outflow) that can become larger than the output of the Amazon River, or it is associated with an…

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Holohraun Five Years Later

A guest post from Salting I visited Iceland many times in the past to meet friends and take a day off on my way between Europa and US. In summer 2011 I made an extra-long stop and visited a glacier to better understand the forces that shaped the coastline around my Swedish home island. Trekking…

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…

Power of the past: 25 super eruptions – continued

The VC list of 25 super eruptions – continued In our quest for major eruptions, we are continuing our journey around the world, moving north from Indonesia. Kyushu, Japan Japan’s southernmost main island is volcanically highly active. Past explosions have left large calderas, separated into two groups. In the centre of Kyushu is Aso, and…

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…

Water, Grimsvötn and Stromboli

After a couple of rather hectic volcanic weeks in the world of volcanoes I thought I would write a little something about two of these events. Namely Stromboli and Grimsvötn, the reason I am cherry picking those two is that they have a common theme, water.   Stromboli Unless you have been to Stromboli you…

Sahara, Scotland

The conifers stand tall, straight. They look old but there are patches where trees have been cut, and there is replanting elsewhere, evidence of tree harvesting. The evergreen forest is popular with tourists. This is in spite of the latitude: there are more northerly places in Scotland, but not many. The climate is not as…