Andes
stoat | December 14, 2010 In stark contrast to the hard liberalism of TW is one of the worst pieces of woolly-thinking soft liberalism (well, actually the Green Party, of which I'm a member and supporter, if you care. It is from their mag). And yet somehow it seems all too typical.
Life in the Peruvian Andes is hard... blah blah... Recently, these communities have experienced the worst winter to hit Peru in nearly 50 years with temperatures plummeting to a deadly minus 24ºC Oh dear. Well, clearly they could do with a bit of warming, then, no? Or are we really obliged to pretend that all climate change is necessarily…
eklemetti | August 27, 2010Sorry about the lack of posts - I've been not only frantically prepping for class and my Eyja talk, but also I'm somewhat under the weather with an ill-timed sickness, so even though there is stuff to talk about, I haven't really had time/wherewithal to deal with it.
However, expect big things from Eruptions next week!
Drawing of a ship washed inland by the tsunami generated by the August 27, 1883 eruption of Krakatau.
I'll throw a few quick links:
The alert status at Galeras has been dropped back down to "orange" after the non-explosive eruption earlier this week. However, INGEOMINAS warns…
eklemetti | August 25, 2010Today was a doubleheader for volcanic eruptions in the news:
Today's explosive eruption from Mt. Etna. Image courtesy of the INGV.
As I briefly mentioned earlier, Galeras in Colombia had an "atypical" eruption - apparently meaning it was non-explosive - that has prompted evacuations and a change in the alert status to "Red" for the volcano. Various news sources don't have a lot of new information yet, but you can check on the report on the INGEOMINAS page (spanish) - and they have links to some of the Galeras news (audio, spanish) from their main page. Some of the latest reports from…
eklemetti | August 25, 2010
An undated photo of the crater at Galeras.
I am literally out the door, so I will fill this article a little more after my prior academic obligations, but there are reports of an eruption at Galeras in Colombia overnight. 8,000 people living near the volcano have been evacuated as INGEOMINAS moved the alert status at the volcano to "Red". Not much out there on the details of the eruption beyond this intriguing statement:
Diego Gomez from the Pasto Observatory of Vulcanology and Seismology said that due to the atypical, non-explosive eruption, another eruption is imminent.
Galeras the most…
eklemetti | August 5, 2010A new Weekly Volcanic Activity Report from the Smithsonian and USGS Global Volcanism Program!
Highlights from this week's report include:
Things are getting a little noisy in Colombia. I mentioned a few weeks ago about a possible explosion at Nevado del Ruiz. Now we have reports of increased seismicity under nearby Cerro MachÃn and ash plumes from Nevado del Huila. After a few centuries of relative quiet, it looks like the volcanoes of the Colombian Andes are looking more lively.
Also in South America, a gas plume was spotted at Chile's Planchon-Peteroa. This is the second time this year…
eklemetti | July 26, 2010When we last left MVP, the latest entry actually did give people some trouble - but Don Crain ended up landing the winner at guess #15. The volcano is Ollagüe along the Chilean/Bolivian border. I took this shot from the road that comes up from the south towards Ollagüe (the town). Now, I have been to Ollagüe (the town) in almost 10 years now, but I did stay in a "hotel" called the Hotel Brin Bran - good soup, surly owner, nice view of both Ollagüe (the volcano) and Aucanquilcha. Definitely the vacation spot if you're visiting the high Andean Chilean/Bolivian frontier.
So, our standings:…
eklemetti | July 25, 2010The northern Chilean and southern Peruvian Andes are full of volcanoes that look stunning - I mean, jaw-dropping details of volcanism litter the landscape. The reason for this is two fold: (1) there is an awful lot of volcanism in the northern Chilean/southern Peruvian Andes (as known as the Central Volcanic Zone) - and has been that way for over 10 million years and (2) it has also been very, very dry in the area (most of which is known as the Altiplano-Puna Plateau) for at least a few millions years as well - it is the home of the Atacama Desert! So, this means you get lots of volcanic…
eklemetti | July 21, 2010
Kilauea lavas on the move near Kalapana. Image taken July 17, courtesy of the Hawaiian Volcano Observatory.
Some news over the last few days:
The lava flows from Kilauea are moving with a vengeance right now, damaging roads and heading for some structures. The lava flows near Kalapana have moved almost 200 meters since Sunday, closing within 100 yards of homes in the area. The lava is moving to the east along Highway 130 and 137 - and tourists are making it difficult to get around as they park to watch the lava - upwards of 2,000 people! A number of people (and dogs) have had to be…
eklemetti | July 4, 2010So, I've had requests on the blog to help to do some defining of volcanologic terms on the blog, so I thought I'd try a new column called Eruptions Word of the Day. I'm not sure how often it will run, but let's give it a try.
Eruptions Word of the Day for July 5, 2010: Dacite
Dacite is a magma type defined by silica (SiO2) content between 63-68 (or 69) weight percent. That is the textbook definition, but some other typical characteristics of dacite lavas (or magmas) is the presence of certain minerals: plagioclase feldspar and hydrous minerals (containing water in their mineral structure)…
eklemetti | July 1, 2010Just a reminder, if you any questions for Sally Kuhn Sennert of the Smithsonian/USGS Global Volcanism Program - about the Weekly Report, about life at the GVP, about volcanoes - be sure to send them to me soon at .
Now, on to this week's update!
Some highlights (not including Gorely):
Lahars from Tungurahua in Ecuador moved blocks upwards of 2 m in diameter downstream over the last week and ash fall was reported over 20 km from the volcano's vent. For some reason, FoxNews decided to use an image of Tungurahua for an article on stats of natural disasters in 2009 - nice image, but the volcano…
eklemetti | June 23, 2010The latest news from the world of volcanoes, brought to us by the Global Volcanism Program, USGS and the Smithsonian Institution. They are also brought to us by Sally Kuhn Sennert - and if you have a question for her about her job at the GVP preparing the Weekly Volcanic Activity Report and all things volcanic (and hopefully it won't end like another recent volcanically-mitigated interview).
Some highlights (not including Gorely and Sakurajima):
Ioto (aka Iwojima) in the Volcano Islands of Japan produced an ash plume of unknown height. The volcano has frequent phreatic eruptions and abundant…
eklemetti | June 17, 2010Have guests in town, so I'm a little busy, but you can hopefully keep entertained with the latest Smithsonian/USGS Global Volcanism Program Volcanic Activity Report.
Chile's Melimoyu volcano.
The highlights (not including Taal and Eyjafjallajökull) include:
Alaska's Cleveland volcano has been reduced to and alert status of "unassigned" (used when a volcano is not closely monitored so AVO doesn't know what exactly is "background") after a few weeks of activity. The same was done for the submarine volcano south of Sarigan in the Marianas Islands after no signs of activity since the eruption…
eklemetti | May 29, 2010
Dark ash covers an American Airline 737 on the tarmac at the airport in Guatemala City.
Two volcanoes are making headlines right now (and neither is in Iceland).
As I mentioned yesterday, Pacaya in Guatemala erupted (video) causing widespread disruption of life in the nearby Guatemala City and costing two people their lives (including a TV reporter who got too close to the vent). Almost 2,000 people have been evacuated from the region near the volcano. The BBC has posted some impressive video of the eruption of Pacaya, showing the strombolian explosions sending basaltic tephra high into the…
eklemetti | May 14, 2010Time to play a little catch up ...
Eyjafjallajökull erupting in early May. Image by and courtesy of Martin Rietze.
A brief update on our friend Eyjafjallajökull - the eruption plume from the volcano was considerably taller yesterday, reaching 6-9 km (20,000-30,000 feet), but prevailing winds meant the ash hazard was confined to areas in the middle of the North Atlantic and northern parts of the British Isles. However, even as the ash hazard for Europe wanes (for now), you shouldn't forget the amount of ash being dumped on parts of Iceland. If you want to see some stunning images of the…
eklemetti | April 20, 2010
Gaua erupting in February 2010. Image courtesy of the NASA Earth Observatory.
As a certain famous Icelandic native would say, "there is more to life than this."
Some other volcano news from around the world:
The situation at Gaua in Vanuatu is worsening. Ash from the current eruption is contaminating water and food supplies on the island. Authorities are planning on evacuating 3,000 people from the island if the eruption that started in 2009 gets worse, but there has already been significant ash fall, mudflows and explosions.
Shiveluch on the Kamchatka Peninsula in eastern Russia continues…
eklemetti | April 7, 2010Actually, no the volcanoes aren't from space, but pictures of the volcanoes were taken from space. The NASA Earth Observatory has posted three more gems of volcanic activity taken by one of the fleet of earth imagers in orbit:
A recent image of Chaiten taken by EO-1. Image courtesy of the NASA Earth Observatory.
There is a great image of the busy Kamchatkan Peninsula, where four volcanoes are seen erupting in a single image - Kliuchevskoi, Bezymianny, Shiveluch and Karymsky. The plume from Karymsky is especially prominent as a grey streak above the white snow of the Russian winter (albeit…
eklemetti | March 31, 2010As a volcanologist, I am partial to impressive lava flows, especially in volcanoes that erupt material that you'd think wouldn't produce big flows. For example, there are quite a few volcanoes in the Chilean Andes that erupt dacite lavas, which are relatively viscous (sticky), so you might expect it to erupt explosively. However, you can get large dacitic to rhyolitic lava flows, quite commonly, and these large flows are called coulées (a "volcanic dome flow").
Lllullaillaco volcano on the Chile/Argentina border. Note the very prominent coulée with flow levees. Click on the image to see a…
eklemetti | March 24, 2010I'm still playing catch-up after my week in the desert, so I've seen a lot of articles I've wanted to mention ... but a certain other volcano has taken up a lot of my time. However, I will attempt to make amends for that now.
By the way, would you believe Ubehebe Crater was closed? How do they close a volcano, anyway? However, I did get a great snap of a welded tuff on the road outside of Shoshone, CA.
A strongly welded tuff near Shoshone, CA. The dark interior is remelted volcanic ash/tephra surrounded by less welded pink tuff with abundant pumice clasts. Denison student David Sisak is on…
eklemetti | February 25, 2010The flu has retreated and I'm getting back on track. Huzzah!
I'll get back to the blog by posting this week's new USGS / Smithsonian Institution Global Volcanism Program Weekly Volcano Report. Looks like some interesting stuff in it ...
Looks like there were some small eruptions from Oldoinyo Lengai in Tanzania. The volcano is one of the few (only active?) carbonatite volcanoes in the world, erupting a lava composed primarily of calcium carbonate and sodium minerals with very little silica. It leads to the odd lava that erupt black (and cool ~ 500C) and cool to white, making it one of the…
eklemetti | February 2, 2010
Tungurahua erupting in an undated AP photo (although I think it is the current 2010 activity.)
It hasn't really made it to much of the English-speaking news, but the current eruptive activity at Tungurahua appears to be on the up-tick. Hugo Yepes of the Geophysical Institute of Ecuador suggests that a larger eruption is not out of the question (link in spanish), but right now the activity is confined to explosions (vulcanian?) and ash fall around the region, specifically on Pillates and Choglontus overnight (2/1) from the ~ 2 km / 5 000 foot plume. Looking at the specifics (link in spanish…