(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	(20170110/1802Z)
(3) Volcano:	Bogoslof (VNUM #311300)
(4) Current Color Code:	ORANGE
(5) Previous Color Code:	RED
(6) Source:	Alaska Volcano Observatory
(7) Notice Number:	2017/A16
(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:	The level of seismic activity at Bogoslof volcano has declined and no further volcanic emissions have occurred since the two strong eruptive pulses on January 8, 2017 at about 22:33 and 22:56 AKST (07:33 and 07:56 Jan 9 UTC). We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH. It remains possible for additional ash-producing eruptions to occur at any time with limited precursory unrest and little warning.
(12) Volcanic cloud height:	Not observed
(13) Other volcanic cloud information:	Not available
(14) Remarks:
(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
Previous Volcano Alert Level: WARNING

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

Issued: Tuesday, January 10, 2017, 9:02 AM AKST
Source: Alaska Volcano Observatory
Notice Number: 2017/A16
Location: N 53 deg 55 min W 168 deg 2 min
Elevation: 492 ft (150 m)
Area: Aleutians

Volcanic Activity Summary: The level of seismic activity at Bogoslof volcano has declined and no further volcanic emissions have occurred since the two strong eruptive pulses on January 8, 2017 at about 22:33 and 22:56 AKST (07:33 and 07:56 Jan 9 UTC). We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH. It remains possible for additional ash-producing eruptions to occur at any time with limited precursory unrest and little warning.

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

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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