Mount Pavlof

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Mount Pavlof
Pavlof Volcano Alaska Peninsula NWR.jpg
Steam and volcanic gas rising from the summit crater of Pavlof Volcano
Elevation 8,251 ft (2,515 m)[1]
Prominence 8,225 ft (2,507 m)[1]
Listing Ultra
Location
Mount Pavlof is located in Alaska
Mount Pavlof
Mount Pavlof
Alaska
Location Alaska Peninsula, Alaska, U.S.
Range Aleutian Range
Coordinates 55°25′10″N 161°53′42″W / 55.41944°N 161.89500°W / 55.41944; -161.89500Coordinates: 55°25′10″N 161°53′42″W / 55.41944°N 161.89500°W / 55.41944; -161.89500[1]
Topo map USGS Port Moller B-6
Geology
Type Stratovolcano
Age of rock 252
Volcanic arc/belt Aleutian Arc
Last eruption May to June 2014
Climbing
First ascent June 27, 1928 by T. A. Jagger, J. Gardiner, O. P. McKinley, P. A. Yatchmenoff, R. H. Stewart
Easiest route Northwest Face: snow/glacier climb
Pavlof 2013 eruption from space

Pavlof Volcano is a stratovolcano of the Aleutian Range on the Alaska Peninsula. It has been one of the most active in the United States since 1980, with eruptions recorded in 1980, 1981, 1983, 1986–1988, 1996–1997, August 15 to September 13, 2007, May 13 to August 8, 2013, and most recently May 31, 2014 and continuing as of June 3, 2014.[2][3] [4] The Alaska Volcano Observatory reports on Pavlof Aviation Color Code levels and Volcano Alert levels on a daily basis.[5] With a threat score of 95,[6] the threat from future eruptions is considered to be high; much of this threat comes from the possibility of disruption of nearby air routes by large releases of ash.[6] The mountain currently has basic real-time monitoring, but the USGS would like to improve instrumentation at the site.[6] The mountain shares a name with the nearby Pavlof Sister, which last erupted in 1786.

The first recorded ascent of Pavlof Volcano was on June 27, 1928, by T. A. Jagger, J. Gardiner, O. P. McKinley, P. A. Yatchmenoff, R. H. Stewart, although "speculation surrounds this ascent, which was recounted in National Geographic."[7] Due to the straightforward nature of the climb, an earlier unrecorded ascent may have occurred. The second ascent was in June 1950 by T. P. Bank.[7]

The main challenge of climbing this peak is its remoteness and the consequent difficulty of access. The peak is a 30 mi (48 km) journey from the north side of Cold Bay. The climb itself is a straightforward snow climb, and the ski descent is recommended.[7]

After its eruption in 1996, the volcano entered a period of dormancy, the longest it had been dormant since records of its eruptions have been kept. This period ended on August 15, 2007, with the start of a new eruption involving seismic disturbances and a "vigorous eruption of lava."[8] Scientists said that the volcano "could be working toward a massive eruption that could affect air travel but was not expected to threaten any of the towns in the area."[8] The eruption ended on September 13.[5] The volcano erupted again on May 13, 2013,[2] but activity had greatly diminished by July 3, 2013, and on August 8, 2013, the Current Volcano Alert Level was reduced to NORMAL and the Current Aviation Color Code reduced to GREEN.[2]

A new low-level eruption began on May 31, 2014. On June 2 seismic activity intensified and officials raised the alert level from "Watch" to "Warning" and the aviation color code from "Orange" to "Red" after pilots in the area reported a smoke plume that reached as high as 22,000 feet above sea level.[9][10]

Map showing volcanoes of Alaska Peninsula.

See also[edit]

Notes[edit]

  1. ^ a b c "Alaskan & Hawaii P1500s - the Ultras" Peaklist.org. Retrieved 2013-01-06.
  2. ^ a b c "Start: May 13, 2013 Observed". Alaska Volcano Observatory. Retrieved May 17, 2013. 
  3. ^ "Pavlof Activity - Color Code GREEN Alert Level NORMAL". Alaska Volcano Observatory. Retrieved August 8, 2013. 
  4. ^ http://www.wired.com/2014/06/alaska-pavlof-eruption-intensify/
  5. ^ a b Alaska Volcano Observatory Daily Update Alaska Volcano Observatory. The AVO is a joint program of the United States Geological Survey (USGS), the Geophysical Institute of the University of Alaska Fairbanks (UAFGI), and the State of Alaska Division of Geological and Geophysical Surveys (ADGGS).
  6. ^ a b c John W. Ewert, Marianne Guffanti, and Thomas L. Murray. An Assessment of Volcanic Threat and Monitoring Capabilities in the United States: Framework for a National Volcano Early Warning System. United States Geological Survey, April 2005.
  7. ^ a b c Michael Wood and Colby Coombs, Alaska: a climbing guide, The Mountaineers, 2001, p. 46.
  8. ^ a b James Halpin. "Alaska Volcano Poised for Huge Eruption". Associated Press. Retrieved 2007-08-18. 
  9. ^ http://www.ibtimes.com/pavlof-volcano-eruption-escalates-alaska-officials-raise-alert-level-1593746
  10. ^ http://www.avo.alaska.edu/activity/Pavlof.php

References[edit]

External links[edit]