An Unmanned Aircraft Systems overflight of fissure
8 on August 21, 2018, showed no incandescence within the cinder cone
. Minor amounts of gases, primarily steam, rose from the north wall of the cinder
cone and from areas along the lower East Rift Zone. The interior walls of the fissure 8 cone and lava channel
are slumping downward and inward. The cinder cone was about 50 m (164 ft) high.