(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	(20170127/1831Z)
(3) Volcano:	Bogoslof (VNUM #311300)
(4) Current Color Code:	RED
(5) Previous Color Code:	ORANGE
(6) Source:	Alaska Volcano Observatory
(7) Notice Number:	2017/A27
(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:	Lightning and seismicity increase indicate a significant explosive eruption began at 08:24 AKST (17:24 UTC). We are thus raising the color code to RED and alert level to WARNING. Satellite data suggests volcanic cloud may be as high as 25,000 ft asl. The current eruption SIGMET issued by the National Weather Service is up to 30,000 ft asl, but may be updated. We are actively evaluating data sources and will provide an update as necessary.
(12) Volcanic cloud height:	25,000 ft asl from satellite data
(13) Other volcanic cloud information:	SIGMET currently to 30,000 ft asl
(14) Remarks:	Please refer to the NWS Alaska Aviation Weather unit for updated information on the volcanic cloud forecast.
(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
Previous Volcano Alert Level: WATCH

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

Issued: Friday, January 27, 2017, 9:31 AM AKST
Source: Alaska Volcano Observatory
Notice Number: 2017/A27
Location: N 53 deg 55 min W 168 deg 2 min
Elevation: 492 ft (150 m)
Area: Aleutians

Volcanic Activity Summary: Lightning and seismicity increase indicate a significant explosive eruption began at 08:24 AKST (17:24 UTC). We are thus raising the color code to RED and alert level to WARNING.

Satellite data suggests volcanic cloud may be as high as 25,000 ft asl. The current eruption SIGMET issued by the National Weather Service is up to 30,000 ft asl, but may be updated. We are actively evaluating data sources and will provide an update as necessary.




Recent Observations:
[Volcanic cloud height] 25,000 ft asl from satellite data
[Other volcanic cloud information] SIGMET currently to 30,000 ft asl

Remarks: Please refer to the NWS Alaska Aviation Weather unit for updated information on the volcanic cloud forecast.

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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