Check out the image below from NASA's Earth Observatory:
These are called von Kármán vortices.
Satellite images
Finally, 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 by…
Mt. Hood in Oregon, taken August 2008. Image by Erik Klemetti. Click on the image to see a larger version.
Quick news!
I'm not going to go into too much depth right now about the recent study published in Nature Geoscience on Mt. Hood in Oregon - I plan to talk about it more in a few weeks. Why is that? Well, the lead investigator on the study, Dr. Adam Kent of Oregon State University, is a friend of mine (and occasional Eruptions commenter) so I plan to get the details from him before posting. I was also peripherally associated with some of this work - mostly in the field acting as a pack…
Lots of little pieces of news I've run across ... time to play a little catch up.
Stromboli: A volcano after Don Ho's heart.
Every once in a while, my RSS feeds will dredge up some articles from years gone by ... and this week there were two New York Times pieces that are a few years old, but interesting nevertheless. The first is about research conducted by Dr. Robert Sohn at WHOI on explosive undersea eruptions. The second is work by Corr and Vaughan about finding subglacial volcanism in Antarctica. Both are interesting reads if you missed them (like I did) the first time around.
Yesterday…
The 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…
Tourists hiking next to an active lava flow on Pacaya in Guatemala in 2006.
I'm flying back to Ohio today after a successful few weeks of fieldwork/paper writing. Apparently I have a pile of tomatoes waiting in our garden in Granville ... !
On to news:
To go with the news that lava flows from Kilauea creep ever closer to structures in Kalapana, the NASA Earth Observatory posts its first volcano image in a bit. The shot shows the steam-and-gas plume from the Halema`uma`u Crater in Kilauea's summit caldera. You can also see some video of the lava flows near Kalapana as they move along the road…
This week went fast, didn't it?
The Baekdu caldera along the North Korean/Chinese border.
The NASA Earth Observatory have been giving us a steady diet of volcanic plumes over the last week, including PNG's Ulawun, Russia's Sarychev Peak (a very faint plume), both an ASTER and Terra image of the summit region at Kliuchevskoi and finally a mix of plume and clouds over PNG's Manam volcano.
I wanted to also mention a brief article I ran into on the Changbaishan/Baekdu caldera along the Chinese and North Korean border. Although short on specifics, this article mentions a number of interesting (…
The NASA Earth Observatory has been dazzling us with images from the Eyjafjallajökull eruption for months - but they have been dazzling us with volcanoes images for years! Here are two more images for those of you who love seeing volcanoes from above:
Cleveland, Alaska
As I mentioned earlier this week, Cleveland volcano likely had a small eruption over the weekend producing a small ash cloud. Cleveland is already known as an extremely picturesque volcano, both from the ground for its highly conical shape - a textbook andesitic stratocone - and from space. This new June 1 image is from almost…
The level of news-frenzy on some of the recent volcanic eruptions has died down, but if you're looking to see information on the many rumbling going on worldwide, look no further. Here is this week's Volcanic Activity Report put together by Sally Kuhn Sennert of the Global Volcanism Program.
Highlights - not including Pacaya, Yasur, Tungurahua and our friend in Iceland - include:
The eruption in the Marianas apparently came from South Sarigan volcano - at least according to the best guess by folks who work in the Marianas. This submarine volcano apparently shows evidence of young lava flows,…
For all of you going into withdrawal now that Eyjafjallajökull seems to have quieted down, there are two eruptions of note that aren't in the North Atlantic:
Undated image of the Barujari cone at Mt. Rinjani in Indonesia.
Arenal in Costa Rica - which is almost always sputtering away - had a more significant explosive and effusive event today. The volcano produced enough ash, bombs and gas emissions - along with 8 lava flows (or avalanches, depending on the source) - to prompt the evacuation of the National Park around the volcano. Arenal has had numerous strombolian eruptions over the last…
News, news, news!
Ash from Eyjafjallajökull piling up on a roof at Seljavellir. Image courtesy of the IMO, by Ari Tryggvason.
The latest from Eyjafjallajökull has the volcano continuing to puff away - producing intermittent airspace closures over Europe. The Icelandic Met Office reports a ~7 km (21,000 foot) ash plume, but they note that the explosivity of the eruption seems to have waned some since a maximum on May 13. Right now, the IMO estimates the eruption rate at ~200 tonnes/second. Lets put that in a little perspective - a Ford F-150 pickup weighs about 2 tonnes, so the volcano is…
Part 2 of your recollections of the May 18, 1980 eruption of Mount St. Helens.
You can read Part 1 here.
You can also check out an amazing set of satellite images spanning 1979-2010 at the NASA Earth Observatory. Great stuff!
-------------------------------------------------------------------------------------------------Eruption plume from Mount St. Helens on May 18, 1980. Image courtesy of the USGS/CVO.
Peter Carlton
My sister and I were playing in our backyard in West Seattle when we heard the boom. I was 6 years old. I remember lots of phone calls with our relatives in Yakima, watching…
An aerial view of Eyjafjallajökull erupting on May 11, 2010, with the extent of the black ash from the eruption on GÃgjökull clearly evident, along with the cracks in the glacier near the lava flow. Photo from the Icelandic Met Office, by Sigurlaug Hjaltadóttir.
Since this past weekend's disruptions due to Eyjafjallajökull, the air over Europe has cleared and most of the airports in Spain, Portugal and Germany (along with those in Morocco) have reopened. The current ash advisory by the London VAAC looks like it will only effect transatlantic flights and Iceland itself, with the ash cloud…
I an in the home stretch for grading exams, so just a quick update for today:
The evidence of floods from the Eyjafjallajökull eruption, taken on May 1, 2010 by Dr. Joe Licciardi.
Airports now as far south as Spain, Morocco and the Canary Islands are facing closures due to the Eyjafjallajökull ash. The latest London VAAC ash advisory has the ash wrapping around western and southern Europe, which I am sure is making life interesting for routing transatlantic flights into Europe. The flights within Europe don't seem to be that effected according to Eurocontrol - and they have even dropped the…
Grading grading grading!
A webcam capture of the eruptive plume from Eyjafjallajökull on the morning of May 6, 2010.
News:
A quick update on the Eyjafjallajökull eruption: The volcano has been producing an impressive ash plume over the last day (see image above). The current ash plume is reaching 5.8-6 km height (19-20,000 ft) - and causing some trouble over Ireland and Scotland. However, much of airspace closed yesterday has reopened (for now). You can see two new images of the ash plume over at the NASA Earth Observatory. As for the continued fallout from the ash plume from April, British…
An undated painting of the island volcano of Ischia near the Bay of Naples, Italy.
Guess what? It is the end of the semester (well, school year) here at Denison, so I might be a little busy for the next couple weeks.
Here are some news bits (with special thanks to all who emailed me some of these links):
Boris might have more information or opinion on this, but Italy is back in the news concerning the threat of volcanism to the country. This time the volcano is Ischia, off the coast in the Bay of Naples. Guido Bertolaso of Italy's civil protection agency is quoted as saying that the "magma…
A night shot of the Eyjafjallajökull eruption showing the glowing plume from the strombolian explosions and the Aurora Borealis overhead.
A quick update on the current activity at Eyjafjallajökull eruption: the eruption continues at the summit craters, but there seems to be less ash being erupted, at least yesterday. The latest update from the Icelandic Met Office suggest that things are settling down - but floods are still periodically being produced by melting of the glacier:
Volcanic tremor has been similar the last 24 hours. GPS stations around Eyjafjallajökull showed deflation…
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 to…
Eyjafjallajokull erupting on 4/17/2010, image by Marco Fulle. Note the "rooster tails" of ash and steam, typical for Surtseyan eruptions.
European airspace has slowly begun to reopen as the explosive eruptions at Eyjafjallajökull have become less intense over the last 24 hours. However, there is still lots of hazardous airspace and airports around places like London and across the UK remain closed - leaving people stranded. We will still have to wait to see what the political ramification are, especially after EU officials claim "flaws" in their decision and the over $1 billion losses by the…
Lots to do!
Tourists flock to the Eyjafjallajökull-Fimmvörduháls in Iceland.
The media does love the term "supervolcano", and a number of Eruptions readers sent me a link to the article on the dreaded submarine "supervolcanoes". I would delve into this article from Live Science, but it sadly again does a dreadful job with a lot of this - remember, "supervolcano" is a made-up word by the BBC with no strict definition, so trying to say there are a dozen supervolcanoes worldwide is just silly. And why does it take multiple paragraphs and multiple mentions of "scientists" before they get a…