
At the summit of Mauna Loa is the current Mokuaweoweo caldera around 5 km long and 3 km wide within an older and larger caldera. The last eruption of Mauna Loa occured in 1984 and was characterised by the usual mild explosive and effusive characteristics that are commonly seen on Hawaii. This included lava flows (aa and pahoehoe), hawaiian acitvity (fire fountaining) and strombolian activity.