The world’s largest active volcano, Mauna Loa on Hawaii

is erupting for the first time in nearly 40 years.

Though lava is flowing down one side of the volcano, the eruption in Hawaii Volcanoes National Park is not threatening communities,

Southwest Airlines is not operating from Hilo International Monday,  It has canceled five flights to and from Honolulu

The eruption began in Moku’āweoweo, the summit caldera of Mauna Loa, on Sunday around 11:30 p.m