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Hawaii’s Mauna Loa volcano is erupting. Here’s what you need to know

The world’s largest active volcano is awake again after almost 40 years

Lava spewing from a fissure with smoke rising

On November 29, Mauna Loa was spewing lava from a fissure on its northeast flank. Fountains from this fissure were up to 25 meters tall.

M. Patrick/USGS

By Carolyn Gramling

- More than 2 years ago

Mauna Loa, Earth’s largest active volcano, abruptly woke up on November 27 after an almost 40-year nap.