Previous Level of Concern Color Code: Green
Current Level of Concern Color Code: YELLOW
This morning, the Alaska Volcano Observatory (AVO) received a report of a
ash and steam emissions from Korovin Volcano on Atka Island, that occurred
at approximately 7:00 PM local time (8:00 PM AST) February 23, 2004.
According to residents of Atka village, the initial ash burst reached a
height of approximately 8,000 feet (2440m) above sea level and drifted
eastward. The initial burst was followed by several smaller ash and steam
bursts. No ash fall was reported in Atka village, nor were there any
reports of accompanying volcanic odors, earthquakes or volcanic explosions.
Satellite images of the volcano examined by AVO do not clearly show the
presence of ash or any thermal anomalies. Telephone conversations with
residents of Atka this morning (2/24/05) indicate that the volcano is
steaming with some vigor.
These observations indicate that a minor eruptive episode of Korovin
Volcano may be in progress and therefore AVO is raising the level of
concern color code of Korovin Volcano from Green to YELLOW.
Low-level steam and ash emissions may continue and could pose a hazard to
people and low- to medium-flying aircraft in the vicinity of the volcano.
If the eruption continues and begins to intensify, light ash fall could
occur on parts of Atka Island, including the village of Atka. Residents
should take the necessary precautions for dealing with an episode of ash
fall. Information about dealing with an ash fall event is contained on the
following internet site:
http://vulcan.wr.usgs.gov/Hazards/Safety/what_to_do_during_ashfall.html or
by contacting AVO.
Current Level of Concern Color Code: YELLOW
On February 24, 2005, AVO received a report of ash and steam emissions from
Korovin Volcano on Atka Island, that occurred at approximately 7:00 PM
local time (8:00 PM AST) February 23, 2005. According to residents of Atka
village, the initial ash burst reached a height of approximately 8,000 feet
(2440m) above sea level and drifted eastward. Since then, we have received
no new reports of activity at Korovin Volcano. Cloud cover over Atka Island
has prohibited satellite views of the volcano.
It is possible that a minor eruptive episode of Korovin Volcano may be
developing or is in progress. Low-level steam and ash emissions may occur
intermittently and could pose a hazard to people and low- to medium-flying
aircraft in the vicinity of the volcano. If eruptive activity increases,
light ash fall could occur on parts of Atka Island, including the village
of Atka. Residents should take the necessary precautions for dealing with
an episode of ash fall. Information about dealing with an ash fall event is
contained on the following Internet site:
http://vulcan.wr.usgs.gov/Hazards/Safety/what_to_do_during_ashfall.html
or by contacting AVO.
Korovin Volcano presently is not being seismically monitored by a standard
AVO seismic network. However, a seismic station that is part of a regional
seismic network operated by the Alaska Earthquake Information Center is
located in Atka village and provides some monitoring capability.
Current Level of Concern Color Code: Not assigned.
Since the report of ash and steam emissions on February 24, 2005, we have
received no new reports of activity at Korovin Volcano. Cloud cover over
Atka Island has prohibited satellite views of the volcano and no unusual
siesmicity has been registered at a seismic station in the village of Atka.
Korovin Volcano presently is not being seismically monitored by a standard
AVO seismic network. It is AVO policy to not assign color code Green to a
volcano that does not have a seismic network on it. Therefore, the color
code for Korovin is not assigned.