Future calderas

Volcanoes erupt all the time. It may seem a quiet time to us but that is because most eruptions are small and low impact, and stay below the radar. An excellent daily overview can be found on http://lechaudrondevulcain.com/blog-spotlight-two-column/ As I write this, it lists on-going eruptions at Sinabung, Etna, Stromboli, and Sabancaya. Volcanodiscovery also lists…

Okmok versus the Roman republic

Okmok is a known hazard. The volcano occupies its own half of Umnak, an isolated part of the Aleutian islands. Okmok is possibly the most active of the 40-odd Aleutian volcanoes. Over the past 8600 years it has produced over 50 ash layers from separate explosions, and minor eruptions happen every other decade. AVO has…

Mercurious

It is a strange one. Metals are shiny, and this one certainly is, in a dark-grey, silvery way. It is so shiny that it can even be used as a telescope mirror. Metals tend to be hard, but this one certainly is not. It isn’t even a solid. Mercury is one of only two elements…

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…

Power of the past: a compilation of 25 super eruptions

The battle of Stalingrad was among the bloodiest and most horrific of the second world war. During the cold winter of December 1942, the Commissar of Stalingrad organised open-air party meetings for local artists and musicians to encourage the exhausted and hungry soldiers. One of those musicians was the violinist Mikhail Goldstein. On New Year’s…

Prelude to Krakatau. III

In Part 1 and Part II we went over the current state of Krakatau and its history over the 300 years before the Big One. Now it is time to find out what caused the Big Bang, whether it is a recurrent offence, and to try our hand at the big question: why is such…

Prelude to Krakatau. II

In part I, we discussed the geology and current state of Krakatau. Now it is time to look at events before the Big Eruption. Was it hiding in the shadows, or did it make its intentions clear to all? History For centuries before its destruction, Krakatau was a familiar landmark. At least some of the…

Prelude to Krakatau. I

Links to Part II and Part III. Other Krakatau posts: Krakatoa: a blast from the past Krakatoa skies: when the Sun turned blue The rise and fall of Anak Krakatau All eruptions have history. Volcanoes may sometimes appear to erupt out of the blue; the mountain may not even have been recognized as a volcano,…

536: apocalypse

The legend of the horsemen of the apocalypse goes back to the first century AD. It is a gripping image, which has transcended cultures. The best-known of the horsemen is Death, riding an ashen-coloured horse. This is the only one given a name in the original. One horseman, riding a black horse, brings famine, making…

Eruptions to come

Let’s start with a question. Which country do you think has the most frequent volcanic eruptions? Before you read on (or peek below for the answer), take a minute to think about it. You can probably guess that Australia is not a front runner. In fact, only two or three countries readily come to mind.…