Author Archives: John A. Stevenson

Bárðarbunga – three weeks of tweets

It’s been over 3 weeks since unrest began at Bárðarbunga, and nearly a fortnight since the fissure eruption began at the Holuhraun.  It’s come at a busy time, so I haven’t managed to blog as much as I would have … Continue reading

Categories: Uncategorized

Bárðarbunga – turning Dettifoss into Niagara Falls

While international concern about an eruption at Bárðarbunga is focussed on flight disruption, a jökulhlaup (meltwater flood) is the most destructive potential outcome of a subglacial eruption. It would travel north from the glacier along the Jökulsá á Fjöllum river, … Continue reading

Categories: Uncategorized

Bárðarbunga – waiting and watching

The word on the street in Reykjavík I’m in the Reykjavík this week on fieldwork. People here have been following developments at Bárðarbunga since the earthquakes began on Saturday. The word on the street is wait and see. The story … Continue reading

Categories: Uncategorized

(Almost) 3D view of Háifoss waterfall, Iceland

Háifoss is Iceland’s second highest waterfall, with a drop of 122 metres.  It’s name means ‘Milky elfin vomit spout’ in Icelandic.  Not really; it’s ‘High waterfall’.  People seem to enjoy the myth that Icelanders believe in elves.  It is located … Continue reading

Categories: Uncategorized

Volcanic life – the first microbes to colonise the Fímmvörðuháls lava

This is a guest post by Dr Laura Kelly, a Lecturer in Microbiology at Manchester Metropolitan University, UK. It describes her study into the first microbial life to colonise the Fímmvörðuháls lava flow, Eyjafjallajökull, Iceland. Prof Charles Cockell of the … Continue reading

Categories: Uncategorized

Fieldwork guide for robots (and humans)

In the future, all our fieldwork will be done by robots while we play around on our hover-boards. In anticipation of this, I have written a program for the robots to follow.  Until that day arrives, it is also a … Continue reading

Categories: Uncategorized

Do Iceland’s volcanoes pose a threat to the UK?

I recently gave a talk about the threat to the UK from Iceland’s volcanoes at the UK’s largest meeting of geography teachers, the GA Annual Conference.  The talk was kindly sponsored by WJEC, who filmed it and have posted the … Continue reading

Categories: Uncategorized

Sources of reliable information about large Icelandic fissure eruptions

Don’t you hate it when you see the film of a book that you enjoyed and they have missed out lots of the best bits?  Or even worse, the director has made changes to the original story for ‘artistic’ reasons?  … Continue reading

Categories: Uncategorized

Fitting probability distributions from binned / quantile data in Python

I’ve made an iPython Notebook that explains how to fit probability distributions to data when only binned values, or quantiles, or perhaps a cumulative distribution are available.  It uses a least squares fit approach.  View it by clicking the picture … Continue reading

Categories: Uncategorized

The most important journals in volcanology

The Journal Impact Factor (JIF; average number of citations to a paper in a journal in the first two years since it was published) is such a poor predictor of an individual paper’s citation count that quoting it is a … Continue reading

Categories: Uncategorized