There was a significant reduction in lava output from Hawaii’s Fissure 8, at the Kilauea volcano’s lower East Rift Zone, on August 6, as seen in helicopter footage published by USGS Volcanoes.

USGS said the significance of the change in lava flow was not immediately clear.

The flight crew saw “a weak to moderately active bubbling lava lake within the fissure 8 cone, a weak gas plume, and a completely crusted lava channel” on the morning of August 6. Credit: USGS Volcanoes via Storyful