A repost from 2016, written by Henrik and part of our series on volcanoes of the American west. There is enough there to make any nation proud! This follows on from the post on Mount Shasta and on Tehama. The more you read about volcanism in North America, the more confused you become by the…
A repost on the region of Lassen Peak in California, originally written by Henrik in 2013 This article began as a regular piece on Lassen Peak but quickly expanded as I discovered how complex the geology and history of the Lassen Volcanic Complex was. Unlike nearby Shasta, Lassen Peak is but a dacite lava dome, one…
This is a repost from the archives, an older post by Henrik which has been updated to reflect more recent findings. Did you know there are 255 volcanoes or volcanic features listed in the US? Volcanic activity in North America is surprisingly infrequent. In spite of there being no less than 255 volcanoes or volcanic…
After our ‘quantum Katla’ post, it is now time to return to the real Katla. For in the real world, Katla has been showing unusually strong shaking. It turned out that Henrik had already done much of the work for us. Here is a resurrected post from the dungeons of 2012 where young Henrik keeps…
The volcano helpfully called ‘Vulcano’, one of the islands, north of Sicilyhas give its name to all volcanoes in the world. Vulcano last eruption was in 1888-1890. During the long repose period, a settlement has grown from a few houses to villas and hotels. Frazzetta et al. wrote in 1984 (quoted by Boris Behncke) “A…
This is a re-post that has been re-posted before. But we attract new readers and sometimes it is worth republishing something. Especially since this is about Icelandic (and other) calderas, something that has been raised in the comments recently. This post was originally written during the Holuhraun eruption and associated Bardarbunga collapse, and you will…
In the middle of an apparent lull in eye-catching activity elsewhere, our interest has been focused on two Central American volcanoes recently that both bear keeping an eye upon for different reasons. Colima has been active since 2013 and is the most active volcano in Mexico. It is covered by a couple of very good…
In her 1948 novel “Trollkarlens hatt” (Finn Family Moomintroll), Finnish author Tove Jansson describes how on the first day of spring Moomintroll and his friends discover a large, black hat and bring it home without knowing that it is the Magician’s lost hat and that anything that stays in the hat too long will be…
Guest post for VolcanoCafé by René Goad First of all I would like to thank Carl Rehnberg for inviting me to write a guest post and I will be talking a bit about the Galapagos Islands. For a good few years I’ve been wanting to visit the Galapagos Islands with the Sierra Negra Volcano…
The more you read about volcanism in North America, the more confused you become by the immense complexity of eruptive phenomenae and sequences. As will be clear from my previous article about Mount Tehama (Lassen), it is not always a question about a single central volcano such as Vesuvius or Etna, but about a multitude…