(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	(20170517/0726Z)
(3) Volcano:	Bogoslof (VNUM #311300)
(4) Current Color Code:	RED
(5) Previous Color Code:	ORANGE
(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:	The explosive eruption that started today, May 16, around 22:32 AKST (May 17 06:32 UTC) is continuing. A pilot reported that the eruption has produced an ash cloud as high as 34,000 ft asl, and the Worldwide Lightning Location Network has detected lightning associated with the cloud. Winds are currently to the south. Ash has not yet been detected in satellite. We are raising the Aviation Color Code to RED and Volcano Alert Level to WARNING.
(12) Volcanic cloud height:	PIREP to 34,000 ft asl
(13) Other volcanic cloud information:	winds are to the south
(14) Remarks:	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 Pavel Izbekov, Acting Coordinating Scientist, UAFGI pavel@gi.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
Previous Volcano Alert Level: WATCH

Current Aviation Color Code: RED
Previous Aviation Color Code: ORANGE

Issued: Tuesday, May 16, 2017, 11:26 PM AKDT
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: The explosive eruption that started today, May 16, around 22:32 AKST (May 17 06:32 UTC) is continuing. A pilot reported that the eruption has produced an ash cloud as high as 34,000 ft asl, and the Worldwide Lightning Location Network has detected lightning associated with the cloud. Winds are currently to the south. Ash has not yet been detected in satellite.

We are raising the Aviation Color Code to RED and Volcano Alert Level to WARNING.


Recent Observations:
[Volcanic cloud height] PIREP to 34,000 ft asl
[Other volcanic cloud information] winds are to the south
[Lava flow/dome] N/A
[Lava flow] N/A

Remarks: 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

Pavel Izbekov, Acting Coordinating Scientist, UAFGI
pavel@gi.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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