Hawaii’s Mauna Loa volcano is erupting. What do you need to know?

Lava, volcanic gas and smog are the main hazards from eruption of the world's largest active volcano

Hawaii's Mauna Loa, the world's largest active volcano, is erupting for the first time in nearly 40 years - causing spectacular scenes, casting an eerie red glow over the island and shooting lava up to 200ft (60 metres) in the air.

Mauna Loa last erupted in 1984. Its smaller, more active neighbor, Kilauea volcano, has been erupting continuously for more than a year since September 2021.