The ground near Hawaii’s Mauna Loa volcano is shaking. What does it mean?

Scientists say the world's largest volcano could erupt and officials are telling residents to be prepared

The ground is shaking and swelling at Mauna Loa, the legendary volcano on the Big Island of Hawaii and the largest active volcano in the world.

Scientists say the shaking indicates it could erupt, though they don't expect that to happen right away. Regardless, officials on the island are telling residents to be prepared.