AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
Great Sitkin | Pavlof | Semisopochnoi 
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
Great Sitkin
Color Code ORANGE / Alert Level WATCHvolcano image
Full details ...
Pavlof
Color Code ORANGE / Alert Level WATCHvolcano image
Full details ...
Semisopochnoi
Color Code ORANGE / Alert Level WATCHvolcano image
Full details ...

LAST ACTIVITY REPORT
RSS FEED
Get these reports emailed to you: USGS VNS

ALASKA VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Thursday, December 2, 2021, 12:51 PM AKST (Thursday, December 2, 2021, 21:51 UTC)


GREAT SITKIN VOLCANO (VNUM #311120)
52°4'35" N 176°6'39" W, Summit Elevation 5709 ft (1740 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Seismicity remains slightly above background levels. Elevated surface temperatures at the summit were observed in a few partly cloudy satellite views over the past day. Web camera views over the past day obscured by clouds. No ash emissions or other signs of unrest were noted.

Lava effusion likely continues at a slow rate. It is possible that explosive activity could occur with little or no warning.

Great Sitkin is monitored by local seismic and infrasound sensors, satellite data, web cameras, and remote infrasound and lightning networks.


PAVLOF VOLCANO (VNUM #312030)
55°25'2" N 161°53'37" W, Summit Elevation 8261 ft (2518 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Unrest continues at Pavlof Volcano. Seismicity remains elevated and several explosions were detected by infrasound sensors over the past day. Elevated surface temperatures observed in partly cloudy satellite views but no ash emissions or other signs of unrest were noted in satellite data. Web camera views of the volcano obscured by clouds.

Small explosions accompanied by low-level ash emissions could happen at any time, and are typically a hazard in the immediate vicinity of the summit. The level of unrest at Pavlof can change quickly and the progression to more significant eruptive activity can occur with little or no warning.

Pavlof is monitored by local seismic and infrasound sensors, satellite data, web cameras, and remote infrasound and lightning networks.


SEMISOPOCHNOI VOLCANO (VNUM #311060)
51°55'44" N 179°35'52" E, Summit Elevation 2625 ft (800 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Low-level eruptive activity continues at Semisopochnoi volcano. Seismic activity at the volcano was generally at low-levels over the past day although several explosions were recorded by infrasound sensors. Minor, low-level (<1500 feet above sea level) ash and steam emissions were observed in web camera images over the past day. Nothing noteworthy was observed in satellite data.

Small eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Cerberus and ash clouds usually under 10,000 ft above sea level have characterized the recent activity. Small explosions may continue to occur and could be difficult to detect, especially during poor weather conditions.

Semisopochnoi is monitored by local seismic and infrasound sensors, satellite data, web cameras, and remote infrasound and lightning networks.


OTHER ALASKA VOLCANOES

Information on all Alaska volcanoes is available at: http://www.avo.alaska.edu.

For definitions of Aviation Color Codes and Volcano Alert Levels, see: http://www.avo.alaska.edu/color_codes.php

SUBSCRIBE TO VOLCANO ALERT MESSAGES by email: http://volcanoes.usgs.gov/vns/

FOLLOW AVO ON FACEBOOK: https://facebook.com/alaska.avo

FOLLOW AVO ON TWITTER: https://twitter.com/alaska_avo

CONTACT INFORMATION:

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

David Fee, Coordinating Scientist, UAF, 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.
NEWS
AVO Radio
AVO Radio - Latest Episode

RUSSIAN VOLCANO INFORMATION

OUTSIDE LINKS
Contact AVO Privacy Accessibility Information Quality FOIA
URL: www.avo.alaska.edu/index.php
Page modified: March 26, 2021 13:42
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.