(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	(20170102/2348Z)
(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:	Seismic data from nearby islands detected a volcanic signal from Bogoslof volcano starting at 13:53 AKST (22:53 UTC) today lasting ~10 minutes. Infrasound (pressure) sensors near Cleveland volcano also detected a signal from Bogoslof, indicating an ash-producing eruption likely occurred. No lightning strikes were identified by the World Wide Lightning Location Network, and no ash-plume above the regional cloud deck (18,000 ft asl) was identified in satellite data over the past 40 minutes. The short duration of seismicity and lack of evidence for ash above the clouds in satellite data suggest this was likely a relatively minor explosion. The current Aviation Color Code remains ORANGE and Volcano Alert Level WATCH.
(12) Volcanic cloud height:	Less than 18000 ft asl
(13) Other volcanic cloud information:	none
(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: WATCH

Current Aviation Color Code: ORANGE

Issued: Monday, January 2, 2017, 2:48 PM AKST
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: Seismic data from nearby islands detected a volcanic signal from Bogoslof volcano starting at 13:53 AKST (22:53 UTC) today lasting ~10 minutes. Infrasound (pressure) sensors near Cleveland volcano also detected a signal from Bogoslof, indicating an ash-producing eruption likely occurred. No lightning strikes were identified by the World Wide Lightning Location Network, and no ash-plume above the regional cloud deck (18,000 ft asl) was identified in satellite data over the past 40 minutes. The short duration of seismicity and lack of evidence for ash above the clouds in satellite data suggest this was likely a relatively minor explosion. The current Aviation Color Code remains ORANGE and Volcano Alert Level WATCH.

Recent Observations:
[Volcanic cloud height] Less than 18000 ft asl
[Other volcanic cloud information] none

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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