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New Eruption Finally Starts on the Reykjanes Peninsula in Iceland

The first eruption on the peninsula in over 1,200 years is a small one (so far), but has produced spectacular lava flows.

Rocky Planet iconRocky Planet
By Erik Klemetti
Mar 22, 2021 2:05 PMMar 22, 2021 2:06 PM
The new eruption at Geldingadalur in Iceland.
The new vent at Geldingadalur in Iceland a few days after the eruption started on March 19, 2021. Credit: Civil Protection and Emergency Management Agency.

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It might have taken a couple weeks longer to start than initially thought, but the eruption that had been forecast on the Reykjanes Peninsula in Iceland finally started late Friday night. A fissure that measured a few hundred feet long opened and small lava fountains started erupting red-hot basaltic lava that formed short flows. Over the course of the next day, the eruption coalesced to form a spatter cone (more on that below) that sporadically collapsed, sending lava rushing from the vent. By Monday morning, the eruption was still going but at a slower rate than the initial salvo.

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