In the event of a worst-case scenario, officials have told about 200,000 people on Hawaii's Big Island to be ready - but said the eruption wasn't immediately endangering towns 🌋 #hawaii #maunaloa #volcano | World's largest active volcano erupts for first time in four decades | Hawaii's Mauna Loa began erupting on Sunday for the first time since 1984, | ending its longest quiet period in recorded history