(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	(20170204/0224Z)
(3) Volcano:	Bogoslof (VNUM #311300)
(4) Current Color Code:	ORANGE
(5) Previous Color Code:	ORANGE
(6) Source:	Alaska Volcano Observatory
(7) Notice Number:	2017/A86
(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:	Seismic tremor began at Bogoslof at 1:41 UTC on February 4 (16:42, February 3 AKST) and is continuing. No ash cloud has been detected as of yet in satellite data, but volcanic ash emissions are likely occurring. Winds are towards the north over the Bering Sea. We are evaluating the magnitude of this eruptive episode. The Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH at present. The National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation up to 20,000 ft above sea level. This will 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.
(12) Volcanic cloud height:	none detected yet
(13) Other volcanic cloud information:	N/A
(14) Remarks:
(15) Contacts:	Michelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497 Jeff Freymueller, Coordinating Scientist, UAFGI jfreymueller@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: WATCH

Current Aviation Color Code: ORANGE

Issued: Friday, February 3, 2017, 5:24 PM AKST
Source: Alaska Volcano Observatory
Notice Number: 2017/A86
Location: N 53 deg 55 min W 168 deg 2 min
Elevation: 492 ft (150 m)
Area: Aleutians

Volcanic Activity Summary: Seismic tremor began at Bogoslof at 1:41 UTC on February 4 (16:42, February 3 AKST) and is continuing. No ash cloud has been detected as of yet in satellite data, but volcanic ash emissions are likely occurring. Winds are towards the north over the Bering Sea. We are evaluating the magnitude of this eruptive episode. The Aviation Color Code remains at ORANGE and the Volcano Alert Level remains at WATCH at present.

The National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation up to 20,000 ft above sea level. This will 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.



Recent Observations:
[Volcanic cloud height] none detected yet
[Other volcanic cloud information] N/A
[Lava flow/dome] N/A
[Lava flow] N/A

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

Jeff Freymueller, Coordinating Scientist, UAFGI
jfreymueller@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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