rhyolite
eklemetti | August 23, 2010Finally, a chance to catch up a bit ... !
Yasur erupting in May of 2010.
Some news from the world of volcanoes:
The BBC has a series of videos one the fallout from the Eyjafjallajökull eruption - including a look at the area around the volcano and how the economy has been affected by the eruption. However, things seem pretty quiet at the summit of the Eyjafjallajökull summit where snow can begun to settle without melting - and the Icelandic Met Office appears to think that the eruption is more or less (but not officially) over. And take this press release as you will, but a recent study…
eklemetti | February 17, 2010
The rhyolite domes of Chaiten in Chile in an undated photo. Note how much of the previous Chaiten Caldera has already been filled by the new domes that started after Chaiten erupted in May 2008.
CNN International has a report that the National Emergency Office (ONEMI) in Chile has reinforced the "red alert" status of Chaiten (spanish). The volcano, which has been erupting since May 2008, had recently settled down to slow, but constant, dome growth. However, over the last 3 weeks, seismicity has been increasing at the rhyolite caldera, suggesting that we might be heading towards an upswing of…
eklemetti | December 31, 2009Here it is, my attempt to recap a year's worth of volcanic events. By no means is this supposed to capture every event, but rather the highlight/lowlights and what most captivated me during 2009. I'll be announcing the winner of the 2009 Pliny for Volcanic Event of the Year tomorrow.
Waimangu Geothermal Valley in New Zealand, taken in January 2009 by Erik Klemetti.
January
The year started out with a trip to New Zealand (well, for me at least) and vistas of the Waimangu Valley, formed in the 1886 eruption of Tarawera on the North Island. We were also still thinking about the late 2008…
eklemetti | October 26, 2009A few weeks ago I asked you to submit questions on the 2008-present Chaiten eruption in Chile to pose to Dr. Jonathan Castro. Dr. Castro recently had a paper on the ascent rates of Chaiten rhyolite published in Nature and he kindly volunteered to answer your questions. Here are the answers to selected questions ... enjoy!
Chaiten in Chile erupting in 2009. Image by Dr. Jonathan Castro.
Dr. Jonathan Castro
Biography:
B.S. from Humboldt State University
Ph.D. from University of Oregon*
Currently a Research Geologist at CNRS-Institut for Sciences de la Terre, Oreans, France
Soon moving on to…
eklemetti | October 23, 2009I finally remembered to bring my GSA notes with me to the office, so I can finally post a wrap up of what I saw/heard at the big 2009 meeting in Portland. I'll have a specific post on Kasatochi - too much to say here. However, a great time was had by all!
The crater of Collier Cone in Oregon. The scoria cone likely experienced years of explosive strombolian eruptions when it formed.
Some interesting volcano-related notes:
Clive Oppenheimer pointed out that the Toba eruption 74,000 years ago covered >1% of the Earth's surface with >10 cm (~4 in) ash. To put that in perspective, the…