The steam and ash plume from the Eyjafjallajökull subglacial eruption that started early morning, April 14, 2010.
Well, after the brief respite when there was speculation Eyjafjallajökull-Fimmvörduháls eruption might be over, we now know what was going on. After the original fissures ceased activity, the magma found a new route to the surface, this time underneath the Eyjafjallajökull glacier. Eruptions readers last night watched as an earthquake swarm arrived underneath the icecap, which prompted Icelandic officials to start evacuating people from the area around the volcano (photo from prior to this eruption) for fears for joklhlaups - volcanically-triggered glacial floods. These floods are started by the intense melting that occurs when basalt at 1200C meets ice - and they can be very powerful floods, moving car-to-house sized material with ease.
The currently, there are reports that the new fissure that has opened underneath the Eyjafjallajökull glacier has created a hole/crater ...