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Hawaii's volcano just spawned a lava 'dome fountain'

Lava forms a “dome fountain” at the inlet to the lava lake in Halema'uma'u crater January 2-3, 2021. Lava from the western vent cascades beneath roofed vertical channels to enter the lava lake at an inlet that has become partially submerged. The result is a rolling upwelling of lava near the inlet called a “dome fountain.” Dome fountains have been observed during eruptions at Mauna Ulu and Pu‘u ‘Ō‘ō. Dome fountains can occur when lava rapidly emerges from a constricted vent or fissure onto the surface or, as in this case, beneath the surface of a lava lake. The feature resembles, in part, a bubbling water fountain. The height of the dome fountain was estimated to be about 5 m (16 ft) with an estimated width of 10 m (33 ft).
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