Kilauea Volcano Produces Tephra Devils During 47th Eruption Episode

USGS scientists observed short-lived Tephra Devils forming over Kilauea’s craters during the volcano’s 47th eruptive episode last week. Tephra is a term for rocks blasted into the air during eruptions. The swirl forms when lava or fresh tephra heats surface air enough to cause it to rise, drawing in surrounding air that twists into a visible column once debris is lifted.

M. last Thursday.

Lava fountains reached a maximum height of 650 feet during this eruption. The current period of frequent activity began on December 23, 2024. Since then, magma chambers beneath the summit have shown little overall change in pressurization, according to a USGS FAQ report.

The next eruption is expected between Friday, May 22 and Tuesday, May 26. These short eruptions have not been strong enough to dramatically change pressure in the magma chambers, which have reached an equilibrium. Tephra can be carried by the wind and cause irritation to the eyes and respiratory system. Along with volcanic gas, it remains the main hazard to local communities during these events.