Contact | subscribe report news || Français | Deutsch
edit translation
|share
Okmok volcano
Central shield complex with nested caldera 1073 m (3520 ft)
Alaska & Aleutians, world, 53.4°N / -168.17°W
Okmok volcano eruptions:
1817, 1824, 1878(?), 1899, 1931, 1935, 1936, 1938, 1943, 1945, 1958, 1960, 1981, 1983, 1986, 1997, 2008
Typical eruption style:
explosive and effusive
Okmok webcams / live data

Okmok volcano: news

Tuesday, Mar 10, 2009
Okmok volcano (Aleutian Islands) activity update: low-level steam-and-ash plumes
The AVO raised the level of danger to the color code Yellow, because of increased seismicity. A eruption in near future is possible. [read all]
Thursday, Aug 21, 2008
Okmok volcano (Aleutian Islands) activity update: low-level steam-and-ash plumes
AVO reported that on 13 August low-level steam-and-ash plumes from Okmok were visible on satellite imagery drifting SE at altitudes of 3-4.6 km (10,000-15,000 ft) a.s.l. During 14-17 August satellite observations were hindered due to cloud cover; seismic levels fluctuated possibly indicating that steam-and-ash emissions continued. During 18-19 August, ash plumes were seen on satellite imagery at altitudes of 3-4.6 km (5,000-15,000 ft) a.s.l. The Volcano Alert Level remained at Watch and the Aviation Color Code at Orange. [read all]
Tuesday, Aug 05, 2008
Okmok volcano (Aleutian Islands) activity update: continuing strong ash emissions
View of Okmok's ash plume emitting from multiple vents near intracaldera Cone D, taken at about 1:30 pm on August 3, 2008 by Jessica Larsen.
View of Okmok's ash plume emitting from multiple vents near intracaldera Cone D, taken at about 1:30 pm on August 3, 2008 by Jessica Larsen.
Ash emissions emitting plumes reaching several kilometers height continue at Okmok volcano. [read all]
Thursday, Jul 24, 2008
Okmok volcano (Aleutian Islands, Alaska): mild to moderate ash eruptions
On 19 July, activity at Okmok increased as interpreted from seismicity. Possibly, ash plumes rose to altitudes of 7.6-9.1 km (25,000-30,000 ft) a.s.l. The Volcano Alert Level was raised to Warning and the Aviation Color Code was raised to Red. ...more [read all]
Wednesday, Jul 16, 2008
Okmok volcano (Aleutian islands), activity update: ash plume
image showing the extent of the sulfur dioxide gas cloud from the eruption of Okmok Volcano. The large red mass is from the main explosive phase on 12 July at 2130 UTC and is at an estimated height of 50,000 ft above sea level. The north-south dimension of this cloud is about 850 miles. Current emissions from the volcano are at a lower altitude of approximately 30,000 to 35,000 feet. Other OMI data (not shown) indicate that volcanic ash is mixed with the sulfur dioxide cloud.
image showing the extent of the sulfur dioxide gas cloud from the eruption of Okmok Volcano. The large red mass is from the main explosive phase on 12 July at 2130 UTC and is at an estimated height of 50,000 ft above sea level. The north-south dimension of this cloud is about 850 miles. Current emissions from the volcano are at a lower altitude of approximately 30,000 to 35,000 feet. Other OMI data (not shown) indicate that volcanic ash is mixed with the sulfur dioxide cloud.
Okmok Volcano continues to erupt. Seismicity, though below this weekend's intensity, has remained steady over the last 24 hours. Satellite data continue to show a long (~250 km) plume moving east; the height of the plume is approximately 30,000 ft above sea level. [read all]
Monday, Jul 14, 2008
Okmok volcano (Aleutian islands), activity update: continuing strong ash emission
The strong eruption at Okmok continues based on ongoing seismic activity and satellite observations. Ash emissions continue reaching altitudes of 30,000 - 35,000 ft asl, and are posing a large hazard to all aircraft in the area. [read all]
Sunday, Jul 13, 2008
Okmok volcano (Aleutians), eruption news: large explosive eruption on 12 July
A large explosive eruption at Okmok volcano began at approximately 11:43 AM local time on July 12 and continues. An ash cloud with a top of at least 30,000-35,000 ft. height above sea level is present. ...more [read all]