2018-05-20 17:54:29 UTC
Seen for the first time in coverage of the Kilauea eruption, phreatic.
"Phreatic -- relating to or denoting underground water in the zone of
saturation (beneath the water table).
(of a volcanic eruption) caused by the heating and expansion of
"Large plumes of ash erupted from Kilauea on Saturday afternoon, as
well. The USGS told ABC News that the plume was another of the ongoing
phreatic -- steam-driven -- explosions that have been seen over the past
few days. The ash cloud on Saturday wasn't as high as ones earlier in
the week. "