Over the past few months there has been a slight increase in earthquake activity in Grímsvötn (Grímsfjall) volcano. This increase in activity strongly suggests that Grímsvötn are now in later stages of getting ready for an eruption.
Earthquake activity in Grímsvötn (Grímsfjall) volcano. Close to centre in Vatnajökull glacier. Copyright of this image belongs to Icelandic Met Office.
Last eruption in Grímsvötn volcano was in 2011 and that was a VEI=4 eruption and the largest one in at least 140 years. I don’t expect next eruption in Grímsvötn to be a big one, but there is no way to know that for sure until an eruption happens. When that happens is impossible to know for sure. When next eruption happens is something that is not possible to know. All that can be estimated that a new eruption in Grímsvötn volcano is not far into the future.
This graph gives a good idea the time interval betweens eruptions (last eruptions since 2000). Copyright of this image belongs to Icelandic Met Office.
Since 2000 the time between eruptions is around 2200 days on average. That number of days is about to happen soon in Grímsvötn volcano.
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