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

PAVLOF



COLOR CODE: ORANGE



Eruptive activity continues at Pavlof Volcano. Two half-hour periods of intense seismicity, beginning 11:30 AM AST (2030 UTC) on November 22 and at 4:30 AM AST (1330 UTC) November 23, resulted in steam and ash emissions reaching altitudes of approximately 30,000 feet ASL and extending downwind. A small ash plume from the November 23 event was detected moving several hundred kilometers to the northwest. No ashfall was reported from local communities this week. Two lava flows continue to advance down the north flank. Lava fountaining and production of local diffuse ash clouds were observed this week and are likely to continue for weeks or months. The Level of Concern Color Code remains at ORANGE and AVO will continue to monitor the volcano closely.



Pavlof is located 600 miles southwest of Anchorage. The

nearest towns to the volcano are Cold Bay (37 mi SW), King

Cove (30 mi SW), Sand Point (60 mi E), and Nelson Lagoon

(50 mi NE). These towns could expect light ash fall

depending on wind direction and level of eruptive

activity.



OTHER VOLCANOES



Seismic activity is monitored in real time at the following volcanoes. Some of the volcanoes listed below may have anomalous seismicity, as noted, but are not considered to be at a potentially dangerous level of unrest.



Iliamna



The seismic swarm that began on 1 August 1996 beneath Iliamna Volcano continued during the past week at an average rate of about 3 earthquakes per day.



Spurr, Redoubt, Augustine, Griggs, Katmai, Trident, Mageik, Martin, Dutton, Akutan, and Makushin volcanoes are all at or near normal levels of seismicity.



ADDITIONAL INFORMATION



AVO maintains a computerized alarm system capable of notifying AVO seismologists during non-business hours should unusual seismic activity occur at monitored Alaskan volcanoes.

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