Intermezzo

Post by Geolurking, based on a repost I have been tasked to revisit something I covered years ago.  And update it with a bit of fresh info.  The original publish date was 20 Feb 2012. The first thing I need to cover, mainly in order to bring every one up to speed… is the compass rose.…

Greip Expectations

  Part 1 of a Greip Series This week, under the rumblings of Torfajökull, we return to one of our favourite areas within Vatnajökull that is yet to show it’s true hand. Or has it already and is there evidence to support that? Due to some recent activity, Carl has been getting increasingly excited in…

The Anchorage earthquake of 2018

Where there are volcanoes, there are earthquakes. Both are a sign of a broken earth. Volcanoes require vertical movement and earthquakes (by and large) are horizontal: the two are not identical, but to get a volcano you need a vertical path, and to get that you need to move crust sideways. Enter the earthquakes. A…

The Sulawesi earthquake

Sulawesi is the unknown Indonesia. Some may remember it under its Portuguese name of Celebes. It is part of the northern chain of Indonesian islands which runs from Borneo to New Guinea. The island has a disjointed shape, appearing as a connection of peninsulas running in random directions, like an uncoordinated octopus. The four peninsulas…

Ancient foundations: the earth of the bible. Part I: Tectonics

Humanity has a long history of living on this Earth. During the days and years, our world continuously changed. We grew up in the shadows of the approaching ice ages. We left Africa when the changing sea opened up a road to Asia, and followed an ever-changing coast line to the far East. And throughout…

Making a Map

A quick overview of my current VCMap project, which can currently be found at http://www.volcanocafe.org/vcmap I would like to start off by thanking Spike Page for being the inspiration for this project.  A couple of weeks ago, Spike wrote on Spike’s Facebook page asking for someone to test out a Google Earth file. This file…

Ischia in motion

This is based on an old post by Carl, The World’s most ill begotten piece of real estate – Part III, which has been slightly reworked. The Chinese have a saying, “May you live in interesting times”. And it is in no way a friendly thing to say; on the contrary it is a rather…

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…