The eruptive past of Indonesia

Gunug Agung has had impressive eruptions in the past week. So far, in spite of the publicity, the event has remained relatively minor. We do not know whether these are the initial rumblings and in the next weeks and months there will be far larger explosions, or that this suffices to relieve the pressure inside…

Super interested in supervolcanoes?

A few days ago, I wrote that we are currently living in a volcanic low period. The last significant eruption happened on the 8th of August in 1991 and the culprit was Cerro Hudson. It was a medium sized VEI-5 eruption expelling roughly 4.5 cubic kilometres of ejecta. After that there has been a 26-year…

The Toba Supereruption

Lake Toba is a beautiful place. The largest and deepest lake in Southeast Asia, it contains an island (Samosir) almost the size of Singapore – the fifth largest lake island in the world, and the largest island-within-an-island. Samosir contains two smaller lakes, Lake Sidihoni and Lake Aek Natonang – the former even contains its own…

The Top-10 most Dangerous Volcanic Systems – Introducing the MDE-concept

There are reports in local Sumatran newspapers that Toba has a bout of indigestion. Low level volcanic type earthquakes have occurred and in the village of Purasa there is gas and steam coming out of the ground. It is important to remember that Toba currently is in a phase of reconstruction and that it is…