A volcanic system in southwest Iceland has erupted for the third time since December. Lava from the eruption engulfed a pipe and cut off hot water supplies to about 30,000 people on the Reykjanes Peninsula.

Repeated rumblings of activity over the past few months suggest that the magma is active underground. The recent activity occurred in a region that has been quiet for centuries. Eruptions tend to occur frequently in one zone for centuries, then the activity moves to another zone.