Sunday, January 27, 2019

New Report Classifies 18 US Volcanoes as 'Very High Threat'

The USGS Has Just Listed These 18 North American Volcanoes as "Very High" Risk

Government scientists have classified 18 U.S. volcanoes as “very high threat” because of what’s been happening inside them and how close they are to people.

The U.S. Geological Survey has updated its volcano threat assessments for the first time since 2005. The danger list is topped by Hawaii’s Kilauea , which has been erupting this year. The others in the top five are Mount St. Helens and Mount Rainier in Washington, Alaska’s Redoubt Volcano and California’s Mount Shasta .

“This report may come as a surprise to many, but not to volcanologists,” said Concord University volcano expert Janine Krippner. “The USA is one of the most active countries in the world when it comes to volcanic activity,” she said, noting there have been 120 eruptions in U.S. volcanoes since 1980.

View image on Twitter

Of the highest threat volcanoes, Washington’s Mount Rainier “has the highest number of people in the downstream hazard zone,” about 300,000 people, said USGS geologist Angie Diefenbach, a report co-author.

Flagstaff, Arizona, is on the border of the large San Francisco Volcanic Field, which is in the moderate threat level, Ewert said.

Government scientists use two dozen factors to compute an overall threat score for each of the 161 young active volcanoes in the nation. The score is based on the type of volcano, how explosive it can be, how recently it has been active, how frequently it erupts, if there has been seismic activity, how many people live nearby, if evacuations have happened in the past and if eruptions disrupt air traffic.

They are then sorted into five threat levels, ranging from very low to very high.

Denison University volcanologist Erik Klemetti said the United States is “sorely deficient in monitoring” for many of the so-called Big 18.

“Many of the volcanoes in the Cascades of Oregon and Washington have few, if any, direct monitoring beyond one or two seismometers,” Klemetti said in an email. “Once you move down into the high and moderate threat (volcanoes), it gets even dicier.”

Because of past activity, Alaska volcanoes tend to have a more extensive monitoring system, said Tom Murray, USGS’s volcano science center director.

The USGS said a dozen volcanoes have jumped in threat level since 2005. Twenty others dropped in threat level. That includes Salton Buttes, California and Fourpeaked in Alaska. None of the Big 18 changed in overall threat levels, even though 11 had overall threat scores dropping.

Threat scores — and levels — change because of better information about the volcanoes, Klemetti said.

Photo: USGS

Among those where the threat score — but not the threat level — is higher are Alaska’s Redoubt, Mount Okmok, Akutan Island and Mount Spurr. Threat scores also rose for Oregon’s Newberry Volcano and Wyoming’s Yellowstone.

Besides the top 5, the rest of the Big 18 are: Mount Hood, Three Sisters and Crater Lake in Oregon; Akutan Island, Makushin, Mount Spurr and Augustine in Alaska; Lassen and Long Valley in California; Mount Baker and Glacier Peak in Washington; and Mauna Loa in Hawaii.

There’s been a lot of speculation of a super eruption at Yellowstone, but Mike Poland, scientist in charge of the Yellowstone Volcano Observatory, said “We don’t really have any indication that Yellowstone is doing anything abnormal.”

You may also like:


  1. I have been browsing online greater than 3 hours lately,
    but I by no means discovered any interesting article like
    yours. It is pretty worth sufficient for me. In my opinion, if all webmasters and bloggers made good content as you probably did, the net will be a lot more helpful than ever before.

    I have been surfing online more than three hours today, yet I never
    found any interesting article like yours. It is pretty worth enough for me.
    In my view, if all webmasters and bloggers made good content as you did, the net will be a
    lot more useful than ever before. I will immediately take hold of
    your rss as I can’t find your email subscription link or newsletter service.
    Do you’ve any? Kindly let me know in order that I could subscribe.

  2. Greetings! I've been following your web
    site for a while now and finally got the courage to go ahead and give you a shout out from Humble Texas!
    Just wanted to tell you keep up the great work!

  3. Hallo, Ich denke dies istt eein ausgezeichhnetes
    Blog. Ich stumbledupon it;) Ichh werde deenken erneut seit ich Buch gekennzeichnet es.
    Geld und Freiheit istt der bese Weg zzu ändern, können Sie reich sein und weiterhn Hilfe andderen Menschen.

  4. Hallo zusammen! Dieses Blog-Eintgrag nicht geschrieben werden viel besser!
    Weenn man durch erinnert mich ann meine früheren Mitbewohner!
    Er ständig Predigt über dies. Ichh vorwärts diese Information zu ihm.
    Zimlich sicher er wird Empfehle lesen. Vieen Daank für

  5. Estaba buscando esa informacion hace ciclo, te lo agradezco, estoy de resolución con tu
    punto de vista y pienso igual. Despues de buscar mucho por
    Internet encontre lo que buscaba. Genial!!! muchas gracias

  6. Great site you've got here.. It's hard to find high-quality writing like yours nowadays.
    I really appreciate individuals like you! Take care!!

  7. Estaba buscando esta indagacion hace mucho duración en internet
    y no la encontraba. Estoy de acuerdo con lo que indicas.
    Gracias es un gran aportación. Un saludo.

  8. Howdy! Jemannd inn meinem Facebook Grupp eilte diese Website
    mit uns so zu schauen Sie vorbei kam ich. Ich bin definitiv genießen Informationen. Ich bin Seite
    verlinken und mein Nachfolger wdrden tweeting this! Ausgezeichnete und grandiosen Desiggn und Stil.

  9. Thhis iis а topic that is near to my hеart... Best ѡishеs!
    Where are yoᥙr contact ɗetails though?

  10. An impressive share! I've just forwarded
    this onto a colleague who had been conducting a little homework on this.
    And he actually ordered me dinner simply because I found it
    for him... lol. So allow me to reword this....
    Thank YOU for the meal!! But yeah, thanks for spending time to discuss this subject here on your website.

  11. Helpful info. Lucky me I discovered your web site accidentally, and I'm shocked why this twist of fate didn't happened
    in advance! I bookmarked it.

  12. Pretty! This has been a really wonderful post.
    Thanks for providing these details.

  13. Hі therе, I enjoy reading all of your post.

    I wanted tto write a little comment to suрport you.

  14. Excellent blog right here! Also your site rather a lot up fast!
    What web host are you the use of? Can I am getting
    your associate hyperlink on your host? I wish my website loaded up as quickly as yours lol

  15. Hi mates, nice piece of writing and good urging commented at this place, I am actually
    enjoying by these.

  16. My spouse and I absolutely love your blog and find many of your post's to be
    exactly what I'm looking for. Does one offer guest writers
    to write content available for you? I wouldn't mind composing a post or elaborating on a few
    of the subjects you write related to here. Again, awesome blog!

  17. Very good blog post. I certainly love this site. Keep writing!

  18. What's up to every body, it's my first pay a visit of this web
    site; this weblog includes awesome and truly excellent data
    for visitors.

  19. Write more, thats all I have to say. Literally, it seems as though
    you relied on the video to make your point. You definitely know what youre talking
    about, why throw away your intelligence on just posting videos to
    your blog when you could be giving us something enlightening
    to read?

  20. Hello to all, how is the whole thing, I think every one is getting more from
    this website, and your views are fastidious in favor of new viewers.

  21. I?m impressed, I have to admit. Rarely do I encounter a blog that?s equally educative and entertaining, and let me tell you, you
    have hit the nail on the head. The issue is something which not enough folks
    are speaking intelligently about. Now i'm very happy I stumbled across this in my search for something concerning this.

  22. If you are aware of flowers that have been a favorite
    of the deceased or that a member of the bereaved household notably favors, those blooms might also be a good selection for a funeral present.

  23. I went over this web site and I conceive you have a lot of good information, saved to favorites (:.

  24. You made some nice points there. I looked on the internet for the issue and found most individuals will approve with your

  25. I always was concerned in this subject and stock still am,
    thank you for putting up.

  26. Some times its a pain in the ass to read what website owners wrote but this internet
    site is very user friendly!

  27. I really love your website.. Very nice colors & theme.

    Did you develop this website yourself? Please reply back as I'm hoping to create my own site
    and would like to learn where you got this from or just what the
    theme is called. Appreciate it!

  28. I am sure this post has touched all the internet visitors, its really really pleasant
    piece of writing on building up new website.

  29. What's up, for all time i used to check website posts here
    early in the morning, for the reason that i love to learn more and more.

  30. What's up it's me, I am also visiting this site on a regular basis, this
    web page is truly good and the people are in fact sharing pleasant thoughts.

  31. I just could not depart your site prior to suggesting that I really loved
    the standard info a person provide in your guests? Is
    gonna be back incessantly in order to investigate cross-check new posts