FILE - Hawaii's Mauna Loa volcano, background, towers over the summit crater of Kilauea volcano in Hawaii Volcanoes National Park on the Big Island on April 25, 2019. U.S. scientists declared ...

Mauna Loa, the world's largest volcano, began spewing molten rock Nov. 27 after being quiet for 38 years.

Mauna Loa, the world's largest volcano, began spewing molten rock Nov. 27 after being quiet for 38 years, drawing onlookers to take in the incandescent spectacle, and setting some nerves on edge ...

Mauna Loa, the world's largest volcano, began spewing molten rock Nov. 27 after being quiet for 38 years, drawing onlookers to take in the incandescent spectacle, and setting some nerves on edge ...

Mauna Loa, the world's largest volcano, began spewing molten rock Nov. 27 after being quiet for 38 years.

Mauna Loa, the world's largest volcano, began spewing molten rock Nov. 27 after being quiet for 38 years.

Mauna Loa, the world's largest volcano, began spewing molten rock Nov. 27 after being quiet for 38 years, drawing onlookers to take in the incandescent spectacle, and setting some nerves on edge ...

Mauna Loa, the world's largest volcano, began spewing molten rock Nov. 27 after being quiet for 38 years.

Mauna Loa, the world's largest volcano, began spewing molten rock Nov. 27 after being quiet for 38 years, drawing onlookers to take in the incandescent spectacle, and setting some nerves on edge ...

Mauna Loa, the world's largest volcano, began spewing molten rock Nov. 27 after being quiet for 38 years.