The terrible disaster in the Nepal and (probably) Tibet has happened, when a debris flow came down one of the river valleys. The toll is still unclear. The images show a wall of mud, tens of meters ...

Observing means noting the details, seeing what is important, what it shows or indicates. Speculation is allowed, but opinions should be based around facts and the holder should be willing to change ...

Volcanoes often use vertical sheets of magma known as dikes to erupt, which intersect the surface as linear fissures, and these sheets of magma act as compasses of the surrounding stress field, ...

Imagine. You are being put in charge of planning for a future major volcanic eruption. All you have is an incomplete list of volcanoes in the world, some experience of past eruptions, and a few ...

It was perhaps the most destructive event in Hawai’i in memory. And it was raised again in the blog comments recently. It turns out we have published a post on it ...

After writing two Io articles I return to Io again my favourite moon, looking at one single lava flow field. But read Alberts and my two other Io posts first. Jupiter’s moon Io is the most ...

The Southern Peninsula (Suðurnes) is the western part of the Reykjanes Peninsula; the border is drawn to exclude Reykjavik and its suburbs. Suðurnes is the first point of call for most visitors to ...

This, of course, is our annual April-1 news story, not all aspects of which are equally reliable. The picture of an unshaped lava mount is a hornito from the Mount Ulu eruption. Indeed, they can form ...

America came late. Humanity had come from Africa, and spread out over Eurasia. This happened mainly during the ice age, when lower sea levels allowed walking migration where previously a significant ...

A fun question: which are the southernmost, most equatorial and northernmost volcanoes in the world? We need to add two provisos here, otherwise this question is impossible to answer: the volcano ...