(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	(20170308/0922Z)
(3) Volcano:	Bogoslof (VNUM #311300)
(4) Current Color Code:	RED
(5) Previous Color Code:	RED
(6) Source:	Alaska Volcano Observatory
(7) Notice Number:
(8) Volcano Location:	N 53 deg 55 min W 168 deg 2 min
(9) Area:	Aleutians
(10) Summit Elevation:	492 ft (150 m)
(11) Volcanic Activity Summary:	A significant explosive eruption that began at Bogoslof volcano at 7:36 UTC on March 8 (10:36 pm AKST on March 7) is continuing, as indicated in seismic, lightning, and infrasound data. The ash cloud from the eruption has been observed to 35,000 feet in satellite images and is heading east. The current Aviation Color Code is RED and Alert level is WARNING. The National Weather Service is issuing a Special Weather Statement for trace amounts (less than 1 mm) of ashfall on Unalaska Island including the community of Dutch Harbor/Unalaska. AVO is evaluating all data sources and will update this report as more information becomes available.
(12) Volcanic cloud height:	Observed up to 35,000 ft.
(13) Other volcanic cloud information:	Height may be revised as new satellite images are received.
(14) Remarks:	The National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation up to 35,000 ft above sea level. This may be revised as new information becomes available. Please see the NWS AAWU at http://www.weather.gov/aawu/sigmets for updated information on aviation warning messages.
(15) Contacts:	Michelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497 Jessica Larsen, Acting Coordinating Scientist, UAF jflarsen@alaska.edu (907) 322-4085
(16) Next Notice:

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AVO/USGS Volcanic Activity Notice

Volcano: Bogoslof (VNUM #311300)

Current Volcano Alert Level: WARNING

Current Aviation Color Code: RED

Issued: Wednesday, March 8, 2017, 12:22 AM AKST
Source: Alaska Volcano Observatory
Notice Number:
Location: N 53 deg 55 min W 168 deg 2 min
Elevation: 492 ft (150 m)
Area: Aleutians

Volcanic Activity Summary: A significant explosive eruption that began at Bogoslof volcano at 7:36 UTC on March 8 (10:36 pm AKST on March 7) is continuing, as indicated in seismic, lightning, and infrasound data. The ash cloud from the eruption has been observed to 35,000 feet in satellite images and is heading east. The current Aviation Color Code is RED and Alert level is WARNING.

The National Weather Service is issuing a Special Weather Statement for trace amounts (less than 1 mm) of ashfall on Unalaska Island including the community of Dutch Harbor/Unalaska.

AVO is evaluating all data sources and will update this report as more information becomes available.

Recent Observations:
[Volcanic cloud height] Observed up to 35,000 ft.
[Other volcanic cloud information] Height may be revised as new satellite images are received.

Hazard Analysis:
[Ashfall] Trace amounts (less than 1 mm) on Unalaska Island

Remarks: The National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation up to 35,000 ft above sea level. This may be revised as new information becomes available. Please see the NWS AAWU at http://www.weather.gov/aawu/sigmets for updated information on aviation warning messages.

Contacts: Michelle Coombs, Scientist-in-Charge, USGS
mcoombs@usgs.gov (907) 786-7497

Jessica Larsen, Acting Coordinating Scientist, UAF
jflarsen@alaska.edu (907) 322-4085



The Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys.

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