Korovin volcano, Andreanof Islands, Aleutian Islands: news & activity updates

Mon, 2 Nov 2020, 06:09 According to Alaska Volcano Observatory (AVO) the activity of the volcano continues at low levels associated with increased sulfur dioxide (SO2) emissions that may be a sign of seismic unrest. As can seen in the image, a warmer colors indicate more SO2. Read all Thu, 29 Oct 2020, 07:02The Alaska Volcano Observatory (AVO) reported that the alert level for the volcano was raised to "yellow", as an increase of seismic activity and sulfur dioxide emissions has been recorded. Read all Wed, 28 Oct 2020, 06:00 On 28 October AVO raised the Aviation Color Code and Volcano Alert Level for Korovin to Yellow and Advisory, respectively, noting that activity was above background levels. Discrete earthquakes were detected over the previous two weeks and sulfur dioxide emissions were identified four times in satellite data on 15, 20, and 26 October. Low-level seismicity continued and no surficial activity was evident in cloudy or partly cloudy satellite images through 3 November. Read all Wed, 1 Nov 2006, 06:00The number of daily earthquakes increased in July and remained elevated into November. Episodes of volcanic tremor that first occurred in September increased in number, strength, and duration in the past several weeks. On 28 October, residents of Atka observed steam emissions to many hundreds of meters above the summit. Read all Wed, 8 Mar 2006, 06:00 AVO decreased the Concern Color Code at Korovin from Yellow to Green (the lowest level) on 8 March. After raising the Concern Color Code on 22 February in response to increased seismicity, the rate of micro-earthquakes stabilized and then declined. During 1-8 March, seismicity was near background levels and no unusual activity was seen on satellite imagery or by observers. Read all Wed, 1 Mar 2006, 06:00Seismicity at Korovin remained slightly above background levels during 24 February to 3 March. Clouds obscured satellite views of the volcano, and AVO received no reports of activity. There were no indications that an eruption was imminent. The volcano remained at Concern Color Code Yellow. Read all Wed, 22 Feb 2006, 06:00 AVO reported that the Concern Color Code at Korovin volcano was raised from Green to Yellow on 22 February due to an increase in seismicity at the volcano. Distinct seismic signals indicating unrest were recorded on 4 days between 17 and 22 January, with a sustained 11-minute-long seismic signal on 22 February. After 22 February, seismicity decreased and distinct seismic signals like those recorded earlier were not detected. Read all Wed, 2 Mar 2005, 06:00AVO did not receive reports of activity at Korovin volcano after the original report of ash-and-steam emissions on 24 February. During 25 February to 4 March, cloud cover prohibited satellite views of the volcano and no unusual seismicity was registered. Korovin is not monitored by a standard AVO seismic network. Read all