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 > Activity Notifications

VOLCANO ACTIVITY NOTIFICATIONS

2014
August (20 reports)
July (33 reports)
June (36 reports)
May (32 reports)
April (30 reports)
March (32 reports)
February (30 reports)
January (35 reports)
2013
December (33 reports)
November (31 reports)
October (34 reports)
September (32 reports)
August (34 reports)
July (32 reports)
June (37 reports)
May (36 reports)
April (30 reports)
March (35 reports)
February (30 reports)
January (33 reports)
2012
December (31 reports)
November (32 reports)
October (31 reports)
September (31 reports)
August (32 reports)
July (31 reports)
June (32 reports)
May (32 reports)
April (30 reports)
March (35 reports)
February (29 reports)
January (9 reports)
2011
December (27 reports)
November (31 reports)
October (31 reports)
September (30 reports)
August (31 reports)
July (15 reports)
June (4 reports)
May (4 reports)
April (5 reports)
March (31 reports)
February (28 reports)
January (31 reports)
2010
December (31 reports)
November (30 reports)
October (31 reports)
September (30 reports)
August (9 reports)
July (5 reports)
June (14 reports)
May (9 reports)
April (13 reports)
March (4 reports)
February (4 reports)
January (10 reports)
2009
December (9 reports)
November (9 reports)
October (25 reports)
September (31 reports)
August (29 reports)
July (35 reports)
June (34 reports)
May (37 reports)
April (34 reports)
March (58 reports)
February (30 reports)
January (39 reports)
2008
December (32 reports)
November (32 reports)
October (36 reports)
September (32 reports)
August (46 reports)
July (45 reports)
June (30 reports)
May (32 reports)
April (33 reports)
March (35 reports)
February (37 reports)
January (35 reports)
2007
2006
2005

Older reports can be found here.

Report Text
Printer friendly version

ALASKA VOLCANO OBSERVATORY CURRENT STATUS REPORT
Wednesday, August 3, 2011 12:33 PM AKDT (Wednesday, August 3, 2011 20:33 UTC)


CLEVELAND VOLCANO (CAVW #1101-24-)
52°49'20" N 169°56'42" W, Summit Elevation 5676 ft (1730 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

AVO raised the Aviation Color Code to Orange and the Alert Level to Watch yesterday in response to observations of a new lava dome in the summit crater of Cleveland Volcano . New observations from August 2 show that the lava dome has grown from about 40 meters (131 feet) to about 50 meters (164 feet) in diameter since July 29. Weak thermal anomalies were detected in satellite images last night and this morning which is consistent with slow dome growth or a cooling dome.

If dome growth continues, lava flows onto the flanks of the volcano may develop but would not be hazardous to aviation. The presence of the lava dome increases the possibility of an explosive eruption, but does not necessarily indicate that one will occur. Short-lived explosions could produce an ash cloud that exceeds 20,000 ft above sea level. These events can occur without warning and may go undetected in satellite imagery for hours.

Without a real-time seismic network at Cleveland, AVO is unable to track local earthquake activity related to volcanic unrest, provide forecasts of potential eruptions, or confirmation of explosive activity. Low-level ash emissions and elevated surface temperatures such as those observed recently do not necessarily mean a larger eruption is imminent. AVO continues to monitor the volcano using satellite imagery.

CONTACT INFORMATION:
John Power, Scientist-in-Charge, USGS
jpower@usgs.gov (907) 786-7497

Steve McNutt, Coordinating Scientist, UAF
steve@giseis.alaska.edu (907) 474-7131

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.
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].
Contact AVO Privacy Accessibility Information Quality FOIA
URL: www.avo.alaska.edu/activity/avoreport.php
Page modified: May 16, 2014 09:40
Contact Information: AVO Web Team

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