Kilauea, the volcano in Hawaii that began erupting almost three weeks ago, exploded again Monday evening and the lava flow from one of its fissures was threatening a geothermal plant, authorities said.

The latest eruption occurred around 5:51 p.m. local time, according to the Hawaii County Civil Defense Agency, citing a report from the Hawaiian Volcano Observatory.

"Eruptive lava activity at multiple fissures continues with one flow entering the ocean," the agency said in a post on Facebook. "Fissure 22 continues to produce most of the lava feeding the flows."