The National Park Service is cautioning people to heed safety precautions while watching volcanic activity since the latest eruption of Hawaii's Kilauea volcano.

What had been low-level lava flows since Thursday morning became more vigorous fountaining Friday evening, according to the U.S. Geological Survey’s Hawaii Volcano Observatory.

Lava is erupting from Hawaii’s Kilauea volcano for the second straight day. The eruption has stayed within Kilauea’s summit caldera inside Hawaii Volcanoes National Park and no homes are threatened.