The aptly named park closed its trails and outdoor features for the day.

Yellowstone National Park has been around since 1872. Here are some fun facts you may not have ever learned about the country ...

Learn how geologists at Yellowstone National Park clean up hot springs filled with litter, saving them from irrevocable damage.

The volcano last erupted 13,000 years ago. But now, scientists suspect that the 'sleeping giant' might be waking up.

Back in January, SFGATE was on the ground in the national park during a previous eruption episode that also rained tephra ...

The eruptions at Kilauea prompted closures at a national park and part of a highway because of falling glassy volcanic fragments, including ash.

Helgi Hjorleifsson, a firefighter, is a leader in a national experiment to steer rivers of lava away from important sites.

The event marks the 43rd episode in the active volcano's ongoing eruption, which began on Dec. 23, 2024 ...

Kilauea volcano erupted Tuesday on Hawaii's Big Island, shooting lava fountains up to 1,000 feet high and sending ash and volcanic debris across nearby communities.

Hawaii's Kīlauea volcano was putting on a spectacular show Tuesday evening, with its latest eruptive episode producing arching bands of red lava higher than some skyscrapers ...

Kīlauea volcano on Hawaii’s Big Island erupted on Tuesday in a nine-hour spectacular, shooting fountains of lava some 1,300 feet into the air, according to the U.S. Geolog ...