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AVO VOLCANO ACTIVITY NOTIFICATION
(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued: (20180406/1831Z)
(3) Volcano: Cleveland (VNUM #311240)
(4) Current Color Code: YELLOW
(5) Previous Color Code: ORANGE
(6) Source: Alaska Volcano Observatory
(7) Notice Number:
(8) Volcano Location: N 52 deg 49 min W 169 deg 56 min
(9) Area: Aleutians
(10) Summit Elevation: 5676 ft (1730 m)
(11) Volcanic Activity Summary: The last detected explosive activity at Cleveland volcano occurred April 4, 2018. We have no evidence of significant eruptive activity since that time. Thus, AVO is lowering the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.

Future explosive activity is likely, and would likely occur without warning. Explosions from Cleveland typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions are possible.

Cleveland volcano is monitored by only two seismic stations, which restricts AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data.
(12) Volcanic cloud height: None
(13) Other volcanic cloud information: n/a
(14) Remarks:
(15) Contacts: Michelle Coombs, Scientist-in-Charge, USGS, mcoombs@usgs.gov (907) 786-7497

David Fee, Acting Coordinating Scientist, UAFGI
dfee1@alaska.edu (907) 322-4085
(16) Next Notice:

AVO/USGS Volcanic Activity Notice

Volcano: Cleveland (VNUM #311240)

Current Volcano Alert Level: ADVISORY
Previous Volcano Alert Level: WATCH

Current Aviation Color Code: YELLOW
Previous Aviation Color Code: ORANGE

Issued: Friday, April 6, 2018, 10:31 AM AKDT
Source: Alaska Volcano Observatory
Notice Number:
Location: N 52 deg 49 min W 169 deg 56 min
Elevation: 5676 ft (1730 m)
Area: Aleutians

Volcanic Activity Summary: The last detected explosive activity at Cleveland volcano occurred April 4, 2018. We have no evidence of significant eruptive activity since that time. Thus, AVO is lowering the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.

Future explosive activity is likely, and would likely occur without warning. Explosions from Cleveland typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions are possible.

Cleveland volcano is monitored by only two seismic stations, which restricts AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data.


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

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

David Fee, Acting Coordinating Scientist, UAFGI
dfee1@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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Page modified: December 2, 2016 10:12
Contact Information: AVO Web Team

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