AVO lowered the Volcano Alert Level for the Atka volcanic complex to Normal (the lowest level on a four-level scale) and the Aviation Color Code to Green (the lowest color on a four-color scale) at 0734 on 9 April. The report noted that activity at the volcano had decreased following the small explosion at the summit crater of Korovin on 27 March, one of the volcanoes at the complex. Though occasional small earthquakes and weak volcanic tremor continued to be recorded, the activity was at background levels.
The activity at the volcano has subsided following the minor explosion detected at the summit crater of Korovin on 27 March.
mer., 3 avril 2024, 18:00
A small, brief, explosion at summit crater of Korovin, one of the volcanoes at the Atka volcanic complex, was detected at 1936 on 27 March, prompting AVO to raise the Volcano Alert Level to Advisory (the second level on a four-level scale) and the Aviation Color Code to Yellow (the second color on a four-color scale). The event was recorded in local infrasound and seismic data and was followed by a few minutes of elevated seismic tremor. Low-frequency earthquakes and periods of seismic tremor were detected during 30 March-1 April.
Read alljeu., 28 mars 2024, 05:34
Weak ash emissions from Atka volcano last night detected in the Korovin webcam (image: AVO)
The alert status for the volcano was raised to "yellow", as a minor, short-lived explosion took place from the volcanic system last night.
Read alljeu., 9 mars 2023, 09:12
On 2 March AVO changed both the Aviation Color Code and Volcano Alert Level for the Atka Volcanic Complex to Unassigned, due to a data outage. The loss of data flow from seismic stations made AVO unable to assess whether the volcano is at its normal background state.
Read allmer., 8 mars 2023, 15:00
On 2 March AVO changed both the Aviation Color Code and Volcano Alert Level for the Atka Volcanic Complex to Unassigned, due to a data outage. The loss of data flow from seismic stations made AVO unable to assess whether the volcano is at its normal background state.
Read alljeu., 2 mars 2023, 11:00
On 2 March AVO changed both the Aviation Color Code and Volcano Alert Level for the Atka Volcanic Complex to Unassigned, due to a data outage. The loss of data flow from seismic stations made AVO unable to assess whether the volcano is at its normal background state.
Read allven., 27 août 2021, 22:23
![Atka volcanic complex (image: AVO)]()
Atka volcanic complex (image: AVO)
The Alaska Volcano Observatory
lowered the Aviation Color Code and Alert Level to "green", as the elevated
seismic activity started to decrease gradually during the past few days and returned to background levels.
Read allmer., 25 août 2021, 06:00
AVO lowered the Aviation Color Code and Volcano Alert Level for the Atka Volcanic Complex to Green and Normal, respectively, on 27 August, noting that seismicity had returned to baseline levels over the previous week.
Read allmer., 18 août 2021, 06:00
AVO reported that small earthquakes and seismic tremors at Atka continued to be detected, though at near background levels during 18-24 August. The Aviation Color Code remained at Yellow and the Volcano Alert Level at Advisory.
Read allven., 13 août 2021, 04:58
The
alert level for the volcano was raised to "yellow", as an elevated seismic activity has been recorded.
Read allmer., 11 août 2021, 06:00
The number of small shallow earthquakes increased at Atka during 10-11 August, prompting AVO to raise the Aviation Color Code to Yellow and the Volcano Alert Level to Advisory. The earthquakes were located at a depth of 3-6 km and around 7 km SW of Korovin, though may be related to the several vents that are part of the Atka volcanic complex. Seismicity declined afterwards but remained above background levels through 16 August, and was near baseline levels by 17 August.
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