Volcano Update from Archive
AVO/USGS Volcanic Activity Notice
Volcano: Cleveland (CAVW #1101-24-)
Current Volcano Alert Level: ADVISORY
Previous Volcano Alert Level: UNASSIGNED
Current Aviation Color Code: YELLOW
Previous Aviation Color Code: UNASSIGNED
Issued: Wednesday, July 20, 2011, 2:48 PM AKDT (20110720/2248Z)
Source: Alaska Volcano Observatory
Notice Number: 2011/A2
Location: N 52 deg 49 min W 169 deg 56 min
Elevation: 5676 ft (1730 m)
Area: Aleutians Alaska
Volcanic Activity Summary: AVO is raising the volcano alert level/aviation color code at Cleveland Volcano from unassigned to ADVISORY/YELLOW based on the presence of persistent thermal anomalies seen in satellite data yesterday and today.
Without a real-time seismic network at Cleveland, AVO is unable to track local earthquake activity related to volcanic unrest. Short-lived explosions with ash clouds that could exceed 20,000 ft above sea level can occur without warning and may go undetected on satellite imagery for hours. Low-level ash emissions at Cleveland occur frequently and do not necessarily mean a larger eruption is imminent. AVO continues to monitor the volcano using satellite imagery.
Recent Observations:
[Volcanic cloud height] No cloud observed.
[Other volcanic cloud information] Nil
Remarks: Cleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emission was in September 2010.
Contacts: John Power, Scientist-in-Charge, USGS
jpower@usgs.gov (907) 786-7497
Steve McNutt, Coordinating Scientist, UAF
steve@giseis.alaska.edu (907) 474-7131
Next Notice: A new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at
http://www.avo.alaska.edu
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: Cleveland (CAVW #1101-24-)
Current Volcano Alert Level: ADVISORY
Previous Volcano Alert Level: UNASSIGNED
Current Aviation Color Code: YELLOW
Previous Aviation Color Code: UNASSIGNED
Issued: Wednesday, July 20, 2011, 2:48 PM AKDT (20110720/2248Z)
Source: Alaska Volcano Observatory
Notice Number: 2011/A2
Location: N 52 deg 49 min W 169 deg 56 min
Elevation: 5676 ft (1730 m)
Area: Aleutians Alaska
Volcanic Activity Summary: AVO is raising the volcano alert level/aviation color code at Cleveland Volcano from unassigned to ADVISORY/YELLOW based on the presence of persistent thermal anomalies seen in satellite data yesterday and today.
Without a real-time seismic network at Cleveland, AVO is unable to track local earthquake activity related to volcanic unrest. Short-lived explosions with ash clouds that could exceed 20,000 ft above sea level can occur without warning and may go undetected on satellite imagery for hours. Low-level ash emissions at Cleveland occur frequently and do not necessarily mean a larger eruption is imminent. AVO continues to monitor the volcano using satellite imagery.
Recent Observations:
[Volcanic cloud height] No cloud observed.
[Other volcanic cloud information] Nil
Remarks: Cleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emission was in September 2010.
Contacts: John Power, Scientist-in-Charge, USGS
jpower@usgs.gov (907) 786-7497
Steve McNutt, Coordinating Scientist, UAF
steve@giseis.alaska.edu (907) 474-7131
Next Notice: A new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at
http://www.avo.alaska.edu
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.
| (1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) | |
| (2) Issued: | (20110720/2248Z) |
| (3) Volcano: | Cleveland (CAVW# 1101-24-) |
| (4) Current Color Code: | YELLOW |
| (5) Previous Color Code: | unassigned |
| (6) Source: | Alaska Volcano Observatory |
| (7) Notice Number: | 2011/A2 |
| (8) Volcano Location: | N 52 deg 49 min W 169 deg 56 min |
| (9) Area: | Aleutians Alaska |
| (10) Summit Elevation: | 5676 ft (1730 m) |
| (11) Volcanic Activity Summary: | AVO is raising the volcano alert level/aviation color code at Cleveland Volcano from unassigned to ADVISORY/YELLOW based on the presence of persistent thermal anomalies seen in satellite data yesterday and today. Without a real-time seismic network at Cleveland, AVO is unable to track local earthquake activity related to volcanic unrest. Short-lived explosions with ash clouds that could exceed 20,000 ft above sea level can occur without warning and may go undetected on satellite imagery for hours. Low-level ash emissions at Cleveland occur frequently and do not necessarily mean a larger eruption is imminent. AVO continues to monitor the volcano using satellite imagery. |
| (12) Volcanic cloud height: | No cloud observed. |
| (13) Other volcanic cloud information: | Nil |
| (14) Remarks: | Cleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi.) west of the community of Nikolski, and 1500 km (940 mi.) southwest of Anchorage. The volcano's most recent significant eruption began in February, 2001 and it produced 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. The 2001 eruption also produced a rubbly lava flow and hot avalanche that reached the sea. The most recent minor ash emission was in September 2010. |
| (15) Contacts: | John Power, Scientist-in-Charge, USGS jpower@usgs.gov (907) 786-7497 Steve McNutt, Coordinating Scientist, UAF steve@giseis.alaska.edu (907) 474-7131 |
| (16) Next Notice: | A new VONA will be issued if conditions change significantly or alert levels are modified. While a VONA is in effect, regularly scheduled updates are posted at http://www.avo.alaska.edu |
