Mauna Loa, the world's largest active volcano, erupted Monday on Hawaii's Big Island.
- The eruption sent ash and volcanic gas into the air, and could leave up to a quarter inch of ashfall on parts of the island.
- So far, lava flows have been contained to the summit area - but officials warn that "can change rapidly".
- Mauna Loa is one of the most active volcanos on the planet, with 33 eruptions recorded since 1843. The region has seen a rise in seismic activity since June.