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SUPERVOLCANOES

SUPERVOLCANOES. One does not simply ignore the past. Images from: http://fc01.deviantart.net/fs71/i/2012/244/b/1/mt_doom_by_thiago_almeida-d5d8iq1.jpg http://lord-of-the-rings.itgo.com/images/boromir.jpg. Volcanoes have a variety of possible impacts

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SUPERVOLCANOES

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  1. SUPERVOLCANOES One does not simply ignore the past Images from: http://fc01.deviantart.net/fs71/i/2012/244/b/1/mt_doom_by_thiago_almeida-d5d8iq1.jpg http://lord-of-the-rings.itgo.com/images/boromir.jpg

  2. Volcanoes have a variety of possible impacts • This shows all the hazards of a typical stratovolcano (composite) like Mt. St. Helens http://pubs.usgs.gov/gip/64/images/coverphoto.jpg

  3. Mt. St. Helens – Not a Supervolcano • On May 18, 1980, Mt. St. Helens erupted – it was the deadliest and most costly U.S. eruption in recorded history – see more here • Mt. St. Helens is one of the most closely monitored volcanoes on the planet – you can even watch what’s happening live! http://www.platetectonics.com/book/images/Mtsthelen_ba.jpg

  4. Ashfall from Mt. St. Helens 1980 http://www.fas.org/irp/imint/docs/rst/Sect3/may18_ashmap.jpg

  5. What is a supervolcano? • A supervolcano is a volcanic center that has the largest explosive capacity (VEI = 8) • Its volcanic deposits would be greater than 1,000 cubic kilometers (240 cubic miles) http://volcanoes.usgs.gov/vsc/images/image_mngr/0-99/img24.jpg

  6. Types and Frequency of Eruptions Rock fragments and particles ejected from the volcano Volcano Explosivity Index – relative measure of how explosive an eruption was http://www.neiu.edu/~jmhemzac/images/123_11/VEI.jpg

  7. Locations of Supervolcanoes • See this interactive map of the locations of the largest eruptions on Earth • Perhaps the best known is Yellowstone http://yellowstone.net/geysers/files/2011/02/map_yellowstone_caldera.gif

  8. Yellowstone Eruptions http://pubs.usgs.gov/fs/2005/3024/images/fs2005-3024_fig_12.jpg

  9. Video Clip • Take notes on how scientists figured out the size of Yellowstone’s magma chamber http://imgc.allpostersimages.com/images/P-473-488-90/22/2222/MPNAD00Z/posters/old-faithful-geyser-yellowstone-national-park-wyoming.jpg

  10. How well are volcanoes monitored? • The United States Geological Survey (USGS) has a series of monitoring stations that keep an eye on the most active volcanoes in the U.S. • Here is a list of the current activity level http://www.uwyo.edu/polarbear/USGS%20logo.png

  11. How likely is a supervolcano eruption? • The odds of a massive supervolcano eruption are very, very small – but smaller eruptions could occur • Nevertheless, their destructive capacity has made for exciting disaster fiction http://i2.listal.com/image/111161/600full-supervolcano-photo.jpg http://www.profindsearch.com/Img/1-yellowstone-eruption-large.jpg

  12. Climate Impact • Even a non-supervolcanic eruption can impact climate http://www.cgd.ucar.edu/ccr/efischer/figs/onlinefig1.gif

  13. Volcanoes to watch: Iceland • In addition to climate change, volcanic eruptions can impact air travel • Watch this! http://www.opengardensblog.futuretext.com/wp-content/uploads/misc/impact%20of%20volcanic%20ash%20on%20planes.jpg

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