Thursday marks the 25th anniversary of the eruption of Kilauea Volcano.
Scientists on the Big Island say it's the longest Kilauea rift zone eruption in at least the last 800 years.
The U.S. Geological Survey's Hawaiian Volcano Observatory says the longest eruptive activity in recent times anywhere on the volcano was at the lava lake near the summit.
It was erupting in 1823 and continued to be mostly active until 1924.
After the past 25 years, the volcano has spewed enough lava to cover the District of Columbia to a depth of 62 feet.
The eruption has destroyed 190 structures, covered nearly nine miles of roadway and has been responsible for the deaths of five sightseers.