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(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued: (20190225/2030Z)
(3) Volcano: Great Sitkin (VNUM #311120)
(4) Current Color Code: GREEN
(5) Previous Color Code: YELLOW
(6) Source: Alaska Volcano Observatory
(7) Notice Number:
(8) Volcano Location: N 52 deg 4 min W 176 deg 6 min
(9) Area: Aleutians
(10) Summit Elevation: 5709 ft (1740 m)
(11) Volcanic Activity Summary: Earthquake activity at Great Sitkin Volcano has decreased to background levels over the past month. There are no evidence of explosive activity in geophysical data streams or in satellite observations. Thus, AVO is decreasing the Aviation Color Code GREEN and Alert Level to NORMAL.
(12) Volcanic cloud height: n/a
(13) Other volcanic cloud information: n/a
(14) Remarks:
(15) Contacts: Michelle Coombs, Scientist-in-Charge, USGS
mcoombs@usgs.gov (907) 786-7497

Pavel Izbekov, Acting Coordinating Scientist, UAFGI
peizbekov@alaska.edu (907) 322-4085
(16) Next Notice:

AVO/USGS Volcanic Activity Notice

Volcano: Great Sitkin (VNUM #311120)

Current Volcano Alert Level: NORMAL
Previous Volcano Alert Level: ADVISORY

Current Aviation Color Code: GREEN
Previous Aviation Color Code: YELLOW

Issued: Monday, February 25, 2019, 11:30 AM AKST
Source: Alaska Volcano Observatory
Notice Number:
Location: N 52 deg 4 min W 176 deg 6 min
Elevation: 5709 ft (1740 m)
Area: Aleutians

Volcanic Activity Summary: Earthquake activity at Great Sitkin Volcano has decreased to background levels over the past month. There are no evidence of explosive activity in geophysical data streams or in satellite observations. Thus, AVO is decreasing the Aviation Color Code GREEN and Alert Level to NORMAL.

Recent Observations:
[Volcanic cloud height] n/a
[Other volcanic cloud information] n/a

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

Pavel Izbekov, Acting Coordinating Scientist, UAFGI
peizbekov@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.