Krafla is a
caldera of about 10 km in diameter with a 90 km long fissure zone, in the north of
Iceland in the
Mývatn region. Its highest peak reaches up to 818 m and it is 2 km in depth. There have been 29 reported eruptions in recorded history.
The
Mývatn fires occurred between 1724–29, when many of the
fissure vents opened up. The
lava fountains could be seen in the south of the island and a
lava flow destroyed three farms near the village of
Reykjahlíð, although nobody was harmed.
Between 1975 and 1984 there was a volcanic episode within the Krafla volcano. It involved nine volcanic eruptions and fifteen uplift and subsidence events.