Largest explosive eruptions, from 1900 to 1500 AD.

After the recent developments of Iwo-Jima volcano, I’ve grown interested in whether submarine calderas are capable, or not, of producing substantial stratospheric sulfur injections, also in the effects and frequency of these injections, and eventually, as one thing led to another, in the identity of the eruptions behind them. Large volcanic explosions emit vast amounts…

A geomorphology dive into caldera systems (calderas on the surface)

Figuring out the eruption history of Afar volcanoes is taking longer than I expected, so in the meantime, I will have to post about other topics. And lately, one that has been present in my volcano discussions, here and elsewhere, has been about caldera volcanoes. It’s nothing new that calderas generate all sorts of admiration…

The White Mountain, Úytaahkoo or Mount Shasta

This is a repost from the archives, an older post by Henrik which has been updated to reflect more recent findings. Did you know there are 255 volcanoes or volcanic features listed in the US? Volcanic activity in North America is surprisingly infrequent. In spite of there being no less than 255 volcanoes or volcanic…

Volcanic Tsunamis: An Analysis

Severe weather forecasting is an exciting science and hobby of mine. Beautiful sights and terrifying storms make it fun. Tornadoes and Hurricanes are particularly incredible to me. A lot of the excitement comes from the fact that no one truly knows exactly what is going to happen during the forecasting portion of an upcoming disaster.…

Volcanic Poker

I’ve never played poker but I already know that I’d be terrible at it. I’m good at reading people but terrible at keeping my mouth shut when I am excited. I’m the type of guy to scream “I’ve got a royal flush!” if I were to get one. A royal flush, consisting of a King,…

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…

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…

The Hunga Tonga eruption of 2022

Volcanoes can be quite predictable, in a general sort of way. We know that Grimsvotn will erupt – just not when, although it is fairly likely to be within the next two years. Similarly, Mount Rainier will erupt some day, although this could be centuries or millennia off. Six years ago, we predicted that Mauna…

The drop dead gorgeous Lake Taupo inside the Oruanui Caldera of Taupo Volcano. Photograph by Bo-deh.

Taupo Tapping Away

Taupo is one of those volcanoes I do not like to write about in Volcanocafé. It is one thing to write a historical retrospect of what it has done in yon olden days, and something completely different when it is doing something interesting. The reason is simple, Taupo is one of those volcanoes that have…