(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	(20170624/0131Z)
(3) Volcano:	Bogoslof (VNUM #311300)
(4) Current Color Code:	ORANGE
(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 explosion was detected in seismic and infrasound data at Bogoslof volcano beginning at 00:49 UTC, June 24 (16:49 AKDT, June 23) and lasting about 10 minutes. A small ash cloud was observed in satellite data starting at 0100 UTC. 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. We will update this report as more information becomes available.
(12) Volcanic cloud height:	Preliminary SIGMET issued by NWS to 30,000 ft asl.
(13) Other volcanic cloud information:	Observed in satellite beginning at 0100 UTC
(14) Remarks:	The National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation up to 30,000 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:	Dave Schneider, Acting Scientist-in-Charge, USGS djschneider@usgs.gov (907) 786-7497 Jeff Freymueller, Coordinating Scientist, UAF 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, June 23, 2017, 5:31 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 explosion was detected in seismic and infrasound data at Bogoslof volcano beginning at 00:49 UTC, June 24 (16:49 AKDT, June 23) and lasting about 10 minutes. A small ash cloud was observed in satellite data starting at 0100 UTC.

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. We will update this report as more information becomes available.

Recent Observations:
[Volcanic cloud height] Preliminary SIGMET issued by NWS to 30,000 ft asl.
[Other volcanic cloud information] Observed in satellite beginning at 0100 UTC
[Lava flow/dome] N/A
[Lava flow] N/A

Remarks: The National Weather Service Alaska Aviation Weather Unit has issued an eruption SIGMET warning for aviation up to 30,000 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: Dave Schneider, Acting Scientist-in-Charge, USGS
djschneider@usgs.gov (907) 786-7497

Jeff Freymueller, Coordinating Scientist, UAF
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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