AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
Cleveland | Pavlof | Semisopochnoi | Shishaldin 
You are here: Home

OTHER US OBSERVATORIES

MEMBER AGENCIES
UAFGI Logo DGGS Logo USGS Logo
The Alaska Volcano Observatory (AVO) is a joint program of the U.S. Geological Survey (USGS), the Geophysical Institute of the University of Alaska Fairbanks (UAFGI), and the State of Alaska Division of Geological and Geophysical Surveys (ADGGS).
RESTLESS VOLCANOES
Cleveland
Color Code YELLOW / Alert Level ADVISORYvolcano image
Full details ...
Pavlof
Color Code YELLOW / Alert Level ADVISORYvolcano image
Full details ...
Semisopochnoi
Color Code YELLOW / Alert Level ADVISORYvolcano image
Full details ...
Shishaldin
Color Code ORANGE / Alert Level WATCHvolcano image
Full details ...

LAST ACTIVITY REPORT
RSS FEED
Get these reports emailed to you: USGS VNS
(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued: (20200120/0937Z)
(3) Volcano: Shishaldin (VNUM #311360)
(4) Current Color Code: ORANGE
(5) Previous Color Code: RED
(6) Source: Alaska Volcano Observatory
(7) Notice Number: 2020/A63
(8) Volcano Location: N 54 deg 45 min W 163 deg 58 min
(9) Area: Aleutians
(10) Summit Elevation: 9373 ft (2857 m)
(11) Volcanic Activity Summary: Ash emissions declined greatly at about 8:30 PM AKST (5:30 UTC 20 January). Seismicity is currently low. The Aviation Color Code is lowered to ORANGE and Alert Level to WATCH.

Satellite images show the detached volcanic cloud drifting east-southeast over the Pacific Ocean. A sigmet from the National Weather Service is still in effect for the detached cloud: https://www.weather.gov/aawu/sigmets

Low-level steam and ash emissions may be ongoing from the summit vent. It is possible for more significant eruption to resume with little warning.

Shishaldin is monitored by local seismic and infrasound sensors, satellite data, a web camera, a telemetered geodetic network, and distant infrasound and lightning networks.
(12) Volcanic cloud height: na
(13) Other volcanic cloud information: na
(14) Remarks: Shishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.
(15) Contacts: Michelle Coombs, Scientist-in-Charge, USGS
mcoombs@usgs.gov (907) 786-7497

David Fee, Coordinating Scientist, UAFGI
dfee1@alaska.edu (907) 322-4085
(16) Next Notice: A new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at http://www.avo.alaska.edu
NEWS

RUSSIAN VOLCANO INFORMATION

OUTSIDE LINKS
Contact AVO Privacy Accessibility Information Quality FOIA
URL: www.avo.alaska.edu/index.php
Page modified: November 14, 2019 12:08
Contact Information: AVO Web Team

twitter @alaska_avo
facebook alaska.avo
email Receive volcano updates by email: USGS VNS

This website is supported by the U.S. Geological Survey under Cooperative Agreement Grant G19AC00060 and G19AC00171.

Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.