(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	(20170528/2249Z)
(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:	An eruption began at Bogoslof volcano today at about 14:16 AKDT (22:16 UTC May 28) and is continuing based on seismic data. No ash cloud has been detected as of yet in satellite data, but volcanic ash emissions are occurring on the basis of lightning detections. Thus, AVO is raising the Aviation Color Code to RED and Alert level to WARNING. Winds are towards the northwest. AVO is evaluating all data sources and will update this report as more information becomes available.
(12) Volcanic cloud height:	None observed yet.
(13) Other volcanic cloud information:	Winds to northwest
(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 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: WARNING
Previous Volcano Alert Level: WATCH

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

Issued: Sunday, May 28, 2017, 2:49 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: An eruption began at Bogoslof volcano today at about 14:16 AKDT (22:16 UTC May 28) and is continuing based on seismic data. No ash cloud has been detected as of yet in satellite data, but volcanic ash emissions are occurring on the basis of lightning detections. Thus, AVO is raising the Aviation Color Code to RED and Alert level to WARNING. Winds are towards the northwest.

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

Recent Observations:
[Volcanic cloud height] None observed yet.
[Other volcanic cloud information] Winds to northwest

Hazard Analysis:
[Ashfall] Evaluation of ashfall potential underway.

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

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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