Taal eruption update

In my previous article I wrote that Taal most likely would not continue to erupt for a long period of time, based on the previous history of the volcano. Obviously Taal decided to go for something not recorded in the historic annals. It is therefore time to take a deeper look at what is going…

Taal in Eruption

This will probably become one of the most famous wedding pictures in history. I fear that this accidental picture will create a fashion and that people will try to recreate it at ever more dangerous volcanoes. In this case it was accidental, this wedding was most likely planned for weeks, if not months, prior to…

The Gentle Giant of Africa

Unless you are more interested in volcanoes than is technically healthy, it is likely that you have missed out a lot on the classic Monty Python skit ‘The twin peaks of Kilimanjaro’. Most people laugh at it since they believe that there is only one peak, but for us with an un-checked interest in volcanoes,…

Magmatic intrusion at Greip

As some has noted there has been quite a bit of activity in the last week at a volcanic feature that we have chosen to call Greip located north of Grimsvötn. We have previously written quite a bit about this feature and even gone so far as to state that it might be in a…

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…

The Rumble in the Jungle

Africa in general is a place that is easy to fall in love with, in particular Tanzania is easy to become deeply enamoured with. Sometimes I think that there is a deep DNA-memory remnant in all of us that is telling us that this is our ancestral home. When most people think about Tanzania, they…

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…

London VAAC Calling

Lately there has been a bit of discussion about Flight Level Ash Advisories and how people interpret them visavi actual columnal height. Some have been disappointed when it has turned out that the advisories have been up to 3 times as high as the confirmed numbers released by the various agencies at a later stage.…

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…

End of times and volcanic fertilizer

As I was flying over Ol Doinyo Lengai I contemplated that it is the largest fertilizer factory on the planet. It is the prime cause of the massive herds of herbivores trekking across the inner parts of Africa. The ash from the volcano super-charges the grass with nutrients and makes it the best animal-feed on…