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(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued: (20201216/0059Z)
(3) Volcano: Makushin (VNUM #311310)
(4) Current Color Code: GREEN
(5) Previous Color Code: GREEN
(6) Source: Alaska Volcano Observatory
(7) Notice Number: 2020/A1284
(8) Volcano Location: N 53 deg 53 min W 166 deg 55 min
(9) Area: Aleutians
(10) Summit Elevation: 5906 ft (1800 m)
(11) Volcanic Activity Summary: The previous Aviation Color Code and the Volcano Alert Level change was a false alarm. Activity at Makushin Volcano remains at background levels, thus the Aviation Color Code and the Volcano Alert Level are being decreased to GREEN/NORMAL.
(12) Volcanic cloud height: n/a
(13) Other volcanic cloud information: n/a
(14) Remarks: Makushin volcano is located on northern Unalaska Island in the eastern Aleutian Islands. Makushin is a broad, ice-capped stratovolcano which rises to an elevation of 6680 feet. The summit caldera, 3 km diameter, is the site of frequent steam and minor ash eruptions; however, no large eruptions have occurred in this century. The community of Unalaska and port of Dutch Harbor are located 25 km (16 miles) east of Makushin volcano.
(15) Contacts: Matt Haney, Acting Scientist-in-Charge, USGS
mhaney@usgs.gov (907) 786-7497

Jessica Larsen, Acting Coordinating Scientist, UAFGI
jflarsen@alaska.edu (907) 322-4085
(16) Next Notice:

AVO/USGS Volcanic Activity Notice

Volcano: Makushin (VNUM #311310)

Current Volcano Alert Level: NORMAL

Current Aviation Color Code: GREEN

Issued: Tuesday, December 15, 2020, 3:59 PM AKST
Source: Alaska Volcano Observatory
Notice Number: 2020/A1284
Location: N 53 deg 53 min W 166 deg 55 min
Elevation: 5906 ft (1800 m)
Area: Aleutians

Volcanic Activity Summary: The previous Aviation Color Code and the Volcano Alert Level change was a false alarm. Activity at Makushin Volcano remains at background levels, thus the Aviation Color Code and the Volcano Alert Level are being decreased to GREEN/NORMAL.

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

Remarks: Makushin volcano is located on northern Unalaska Island in the eastern Aleutian Islands. Makushin is a broad, ice-capped stratovolcano which rises to an elevation of 6680 feet. The summit caldera, 3 km diameter, is the site of frequent steam and minor ash eruptions; however, no large eruptions have occurred in this century. The community of Unalaska and port of Dutch Harbor are located 25 km (16 miles) east of Makushin volcano.

Contacts: Matt Haney, Acting Scientist-in-Charge, USGS
mhaney@usgs.gov (907) 786-7497

Jessica Larsen, Acting Coordinating Scientist, UAFGI
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.