AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
Summary | Webcams | Webicorders | RSAM | Recent Earthquakes | Volcano Activity Notifications | Search Notifications | Cleveland
You are here: Home > Current Volcanic Activity

AVO Archived Volcano Activity Notifications

2007
December
November
October
September
August
July
June
May
April
March
February
January
2006
December
November
October
September
August
July
June
May
April
March
February
January
2005
December
November
October
September
August
July
June
May
April
March
February
January
2004
December
November
October
September
August
July
June
May
April
March
February
January
2003
2002
2001
2000
1999
1998
1997
1996
December
November
October
September
August
July
June
May
April
March
February
January
1995
1994
1993
1992
December
November
October
September
August
July
June
May
April
March
February
January
1991
1990
1989
Archived Report
Printer friendly version

KANAGA VOLCANO



This morning at 5:00 AM ADT, FAA received a pilot report of "glowing" at the summit of Kanaga. At 8:00 AM ADT, pilots reported a light gray, dense steam cloud rising to 15000 feet above the summit. The plume had a mushroom-shaped top and was trailing eastward. A satellite infrared image taken at 8:36 AM ADT shows a hot spot at the summit that is twice as large as that seen in recent weeks. Also visible in the image is a plume that extends 15 to 20 km to the northeast. Winds in the area today are from the southwest and light. An 11:33 AM ADT image shows a feathery plume extending 50 km to the northeast. Enhancements of calibrated data from the earlier image suggest that the plume may contain some ash. Observers in Adak reported seeing a light- to medium-gray cloud rising to about 15000 feet ASL. The activity probably reflects an increase in heating at the summit associated with production of lava flows. The plume appears to be largely steam with minor ash.



Kanaga Volcano is a 1307-meter-high stratovolcano on the north end of Kanaga Island, 965 km west-southwest of the tip of the Alaska Peninsula. The nearest settlement is Adak, on Adak Island, where a U.S. Naval Station is located. Although there is evidence of prehistoric major explosive eruptions at Kanaga, during the last 200 years only about a dozen episodes of low-level activity have been reported. Much of the activity has been fumarolic, however, in 1906 a series of lava flows were produced on the northeast and southwest flanks. The recent cycle of activity began in December 1993 and has been characterized by low-level steam and ash emissions as well as new lava flows down the north and northwest flanks that have reached the sea.

Volcano Alert Levels
NORMAL
Volcano is in typical background, noneruptive state or, after a change from a higher level, volcanic activity has ceased and volcano has returned to noneruptive background state.
ADVISORY
Volcano is exhibiting signs of elevated unrest above known background level or, after a change from a higher level, volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.
WATCH
Volcano is exhibiting heightened or escalating unrest with increased potential of eruption, timeframe uncertain, OR eruption is underway but poses limited hazards.
WARNING
Hazardous eruption is imminent, underway, or suspected.
Aviation Color Codes
GREEN
Volcano is in typical background, noneruptive state or, after a change from a higher level, volcanic activity has ceased and volcano has returned to noneruptive background state.
YELLOW
Volcano is exhibiting signs of elevated unrest above known background level or, after a change from a higher level, volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.
ORANGE
Volcano is exhibiting heightened or escalating unrest with increased potential of eruption, timeframe uncertain, OR eruption is underway with no or minor volcanic-ash emissions [ash-plume height specified, if possible].
RED
Eruption is imminent with significant emission of volcanic ash into the atmosphere likely OR eruption is underway or suspected with significant emission of volcanic ash into the atmosphere [ash-plume height specified, if possible].
PDF version of these definitions
URL: avo.alaska.edu/activity/avoreport_archives.php
Page modified: June 11, 2012 11:50
Contact Information: AVO Web Team

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