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

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

VENIAMINOF



Veniaminof Volcano is a broad conical mountain truncated by a spectacular ice-filled summit caldera about 10 km in diameter; the highest part of the caldera rim is about 8400 feet. An active intracaldera cone rises to an altitude of 7075 fet (about 1000 feet above the surrounding ice-field) in the western part of the caldera. This cone was the site of the the last eruption in 1983-84. Renewed activity since July 1993 has typically consisted of low-level ash eruptions and sporadic lava flows.



Pilot reports of volcanic activity were logged by the Federal Aviation Administration today. Reports indicated that a steam and ash plume was being produced from the active cone in Veniaminof caldera. Initial reports today at 1047 ADT indicated that a plume was rising from the vent to an altitude of 12,000 feet above sea level, extending 15 to 20 miles downwind in a general southwesterly direction. The plume was described as being dark-gray near the summit of the mountain and becoming wispy at some distance away. AVO scientists detected the presence of a weak ash plume on AVHRR satellite images of Veniaminof. A "warm" spot on the satellite images has persisted throughout this past week. This type of activity is typical of the recent eruptive history of Veniaminof.

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
Contact AVO Privacy Accessibility Information Quality FOIA
URL: avo.alaska.edu/activity/avoreport_archives.php
Page modified: May 27, 2014 10:23
Contact Information: AVO Web Team

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