Iceland seismicity – monthly review (July 2017 edition)

Ever since I began plotting earthquake data for Iceland and generally for the world (where data is available), I was planning to do a monthly review of the seismicity in Iceland, so we can keep track of it on a monthly basis. Of course, if there is any stronger activity or something unusual happens, usually…

Greip, Gjálp’s Mysterious Sister

In this article, we move away from the usual suspects in Icelandic volcanism and turn our attention to a feature many of us have noticed over the years. This feature has only been revealed from seismicity, but here I try to unravel the past and future activity as well as give this feature a sense…

Failure

The signs were unequivocal. It started with earthquake swarms. A phreatic eruption followed, and than the ground began to swell. Magma was approaching the surface. An eruption was on the cards and evacuation plans were put in place. An exclusion zone kept people safe but not their possessions – and as always some people could…

The Dead Zone 2: The Sound of Silence

Although I’m more of an unseen hand (Volcanonati?) behind the scenes at VolcanoCafe and the VC Facebook group, I wanted to step out the shadows and give the Dead Zone article some new light. It’s an area I’ve always been fascinated with and it was this very area, along with its fissure eruptions, that first…

Mississippi Blues: The earthquakes of New Madrid

The Mississippi valley had once been densely inhabited, but it was so no longer. The Indian cultures had been decimated by disease; their lands were emptied and their villages deserted. The area had just become US property, and American settlers were moving in but it was still early days, here on the western frontier, in…

Faults of New Zealand

It is a wonderful, and funny place. New Zealand has more than its fair share of the world’s beauty. You want volcanoes, rivers, beaches, forests, mountains, liveable cities, it has it all. Its history is out of this world. Apart from a few bats and some dolphins, the first mammals to arrive were human. In…

The Apennine fault

Rome is an ancient wonder. It feels strange, walking along a street next to the heart of the world city, but surrounded by old ruins. Here the old survives next to the new. There was extensive damage done by the Vandals, the people who overran Italy in the 5th century. They cut off the water…

The Lisbon Earthquake

At one time, Portugal ruled the world. Its explorers discovered the Cape of Good Hope, created colonies around the Indian Ocean, reached China and Japan, founded the city of Nagasaki, and claimed much of South America. The glory days of the Portuguese empire lasted from 1415 to 1750, and left a rich heritage in Portugal.…