(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	(20170126/1616Z)
(3) Volcano:	Bogoslof (VNUM #311300)
(4) Current Color Code:	RED
(5) Previous Color Code:	ORANGE
(6) Source:	Alaska Volcano Observatory
(7) Notice Number:	2017/A28
(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 an explosive eruption began at 06:50 AKST (15:50 UTC). A larger burst of seismicity occurred at 07:06 AKST (16:06 UTC). We do not yet have information on volcanic cloud height, but comparison to seismicity from previous events suggests that this event may be similarly energetic. We are thus raising the color code to RED and alert level to WARNING. We are still evaluating data and will provide an update as necessary. Lower level winds (below 10,000 ft asl) are currently to the southeast and to the northeast at higher altitudes.
(12) Volcanic cloud height:	none observed
(13) Other volcanic cloud information:	n/a
(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 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: Thursday, January 26, 2017, 7:16 AM AKST
Source: Alaska Volcano Observatory
Notice Number: 2017/A28
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 an explosive eruption began at 06:50 AKST (15:50 UTC). A larger burst of seismicity occurred at 07:06 AKST (16:06 UTC). We do not yet have information on volcanic cloud height, but comparison to seismicity from previous events suggests that this event may be similarly energetic. We are thus raising the color code to RED and alert level to WARNING. We are still evaluating data and will provide an update as necessary.

Lower level winds (below 10,000 ft asl) are currently to the southeast and to the northeast at higher altitudes.



Recent Observations:
[Volcanic cloud height] none observed
[Other volcanic cloud information] n/a

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

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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