Grimsvötn – The Saksunarvatn Tephras

A repost on the past of Grimsvotn, as it seems to be nearing its next eruption, albeit not on the same scale as the one described here! It is sometimes hard to understand the size of the Icelandic volcanic systems. We often read statistical things like “Half of all the ash in Europe” and “One…

The Sundhnukur Fires. Summary, precedents, and future.

We are still learning. There is much we humans don’t know about volcanoes or about how they behave. The past few years have been enlightening. It all started in January 2020, the Svartsengi region started rising, and an elliptical area of inflation appeared that encompassed Mount Thorbjörn, the Svartsengi Power Plant, and the 800 years…

Grindavik Visualised – Part I

Due to this article being so graphics heavy, I had to break it up into two parts, with the second part coming tomorrow evening. It is somewhat ironic that my brain is operating mainly in a graphical mode, and that I think in visualisations and graphic models, whereas at the same time I am about…

The Reykjanes Fires, 950-1240 AD

This is a repost of a summary by Hector, of the previous round of Reykjanes eruptions, a millennium ago. (The post is not as old as that, though. It was written during the first Fagradalsfjall eruption, at the very start of the new fire season.) The discussion includes two of the three Svartsengi eruptions of…

Grindavik dropping into the sea

Foreword Like minds and all, both me and Albert set out to write an update article unbeknownst to each other. I guess that Albert has not yet fully come to grips with me returning back to “life”. But, this is a good thing for you as a reader, you get twice the fun from two…

Þorbjörn on the brink

Volcanoes rarely follow human timescale and human planning. This time it is Þorbjörn that decided to ruin things just after Albert had published a truly nice read about Santa Maria. Þorbjörn better do as told below, otherwise Albert will have words with the volcano in question for ruining his article scheduling.   Background In the…

Volcanism and the Christianization of Iceland

By Jean-Marie Prival, doctor in volcanology and founder of kīpuka magazine Like other natural disasters, volcanic eruptions can have an impact on civilizations. Of course they can annihilate them, but they can also contribute to their economic development by providing a valuable resource (obsidian, for example). Finally, they can influence their culture, giving rise to…

A small update on Reykjanes and Hawaii

Today I’ve noticed that a swarm is taking place near the Grindavik in the Reykjanes Peninsula, this swarm is small but is probably related to the ongoing Reykjanes Fires. I will also use this chance to talk about the recently ended Kilauea eruption, its build-up, and what the future might hold for Kilauea. Earthquakes north…

A smoke coming out of a volcano Description automatically generated

Fagradalsfjall, Season 3

It is hard to remember what Iceland was like three years ago. At that time, most (or all) eruptions were in the eastern volcanic zone, from Katla (and friends) to Krafla. (Ok, one can argue about the precise borders. Grimsvotn was about to erupt. The Thorbjorn swarm had happened and an eruption at Reykjanes was…

Katla: a retrospective

After our ‘quantum Katla’ post, it is now time to return to the real Katla. For in the real world, Katla has been showing unusually strong shaking. It turned out that Henrik had already done much of the work for us. Here is a resurrected post from the dungeons of 2012 where young Henrik keeps…