a glacial river. At this time, the geothermal
activity beneath Öræfajökull was
assessed to be high relative to previous decades.
As that
behaviour was
above known
background conditions, it could potentially indicate increased risk of eruptive
activity that could
affect air traffic. Consequently, the Icelandic Meteorological Office raised the
Aviation Color Code for Öræfajökull from Green to Yellow
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