(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	(20170109/0754Z)
(3) Volcano:	Bogoslof (VNUM #311300)
(4) Current Color Code:	RED
(5) Previous Color Code:	ORANGE
(6) Source:	Alaska Volcano Observatory
(7) Notice Number:	2017/A14
(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:	Explosive eruption of Bogoslof occurred starting around 22:23 AKST (07:23 Jan 9 UTC) as detected in seismic and infrasound data, with the strongest signal at about 22:31 AKST (07:31 Jan 9 UTC). Seismic signal declined around 22:38 AKST (07:38 Jan 9 UTC) but is still above background. We do not yet have any satellite images of a cloud but seismicity suggests an event at least as large as others in the recent sequence. We are raising Aviation Color Code to RED and Volcano Alert Level to WARNING. Winds are currently out of the southeast.
(12) Volcanic cloud height:	Not observed
(13) Other volcanic cloud information:	Not available
(14) Remarks:	Status of the ash cloud can be found at the Alaska Aviation Weather Unit website at http://aawu.arh.noaa.gov/
(15) Contacts:	Michelle Coombs, Scientist-in-Charge, USGS mcoombs@usgs.gov (907) 786-7497 Janet Schaefer, Acting Coordinating Scientist, DGGS janet.schaefer@alaska.gov (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, January 8, 2017, 10:54 PM AKST
Source: Alaska Volcano Observatory
Notice Number: 2017/A14
Location: N 53 deg 55 min W 168 deg 2 min
Elevation: 492 ft (150 m)
Area: Aleutians

Volcanic Activity Summary: Explosive eruption of Bogoslof occurred starting around 22:23 AKST (07:23 Jan 9 UTC) as detected in seismic and infrasound data, with the strongest signal at about 22:31 AKST (07:31 Jan 9 UTC). Seismic signal declined around 22:38 AKST (07:38 Jan 9 UTC) but is still above background. We do not yet have any satellite images of a cloud but seismicity suggests an event at least as large as others in the recent sequence. We are raising Aviation Color Code to RED and Volcano Alert Level to WARNING.

Winds are currently out of the southeast.

Recent Observations:
[Volcanic cloud height] Not observed
[Other volcanic cloud information] Not available

Remarks: Status of the ash cloud can be found at the Alaska Aviation Weather Unit website at http://aawu.arh.noaa.gov/

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

Janet Schaefer, Acting Coordinating Scientist, DGGS
janet.schaefer@alaska.gov (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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