This is continuing to feed fast-moving lava flow that is entering the Pacific Ocean at Kapoho in the Puna district near the eastern tip of the island, destroying everything in its path.
No one has died in the Hawaii eruption but some 600 homes have been swallowed by lava flows from Kilauea since May 3.
Kilauea has been erupting since the start of May, with the resulting lava flow destroying hundreds of buildings.
There's no way to know when the eruption will end or if more lava-spewing vents will open, according to USGS scientists.
The USGS said fountaining from fissure 8 reached as high as about 200 feet Saturday, and there was some minor lava activity from fissures 16 and 18.
In the meantime, fewer workers are needed to staff a 24-hour operations center and officials are reducing checkpoints, Magno said. Magno says additional workers can be called in if conditions change.
Also Saturday, there was an explosive eruption of rock and ash at Kilauea's summit at 4:50 a.m. that produced a plume expected to possibly blow to the southwest toward Wood Valley, Pahala and Ocean View.
The Hawaiian Volcano Observatory warned residents to avoid the ocean entry area, as it continued to produce large plumes of lava.
The U.S. Geological Survey says the magnitude 5.2 natural disaster happened around 4:50 a.m. Saturday on the Big Island and felt as far as Hilo. But the unit has been broken since Thursday.
Ash expelled during explosions may cause poor visibility and slippery conditions for drivers.
Lava covers a road on the outskirts of Pahoa during ongoing eruptions of the Kilauea Volcano in Hawaii, U.S., June 9, 2018.