Scientists observe 2 new lava flows on Mauna Loa, the world’s largest active volcano Tuesday, November 29 by ABC News(NEW YORK) -- Scientists have observed two new lava flows out of the Mauna Loa volcano on Hawaii's Big Island -- the largest active volcano in the world.The lava is flowing north out of Fissure 3 in the northeast rift zone, crossing the road... Read More.