Ash and rock fragments (tephra) ejected during lava fountain activity are unlikely to be high enough to disrupt regional air traffic.

This indicates that a lava fountain probably blasted lava away from its point of origin.

During the night a 700 m high lava fountain was thrown up from the main crater.

These were deposited during periods of lava fountain activity.

At times, lava fountains were reaching heights of 200 feet and feeding a lava flow that advanced to the northeast.