Today (3-September-2021) an small earthquake swarm took place in Esjufjöll volcano. This is the first earthquake activity in a while and suggest that there might be about to start more earthquake activity in Öræfajökull volcano. Since activity in Esjufjöll volcano seems to result in activity in Öræfajökull volcano. How that works and why is unknown.
Last eruption in Esjufjöll volcano may have happened in the year 1927 but that remains unconfirmed. If that eruption happened, it only lasted for 4 to 5 days at most. This area is covered with a glacier, so any eruption there is going to result in a glacier flood.
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