Photograph by J.D. Griggs on 25 February 1983. Arching lava
fountain 10-15 m tall on the east rift zone
of Kilauea Volcano, Hawai`i.
Arching fountain
Instead of shooting lava vertically from a vent, an arching
lava fountain sends lava upward and outward. Arching fountains
form when the shape or geometry of an erupting vent forces the
lava outward in a continuous stream of airborne lava.