Sightseers Jam Roads and Airspace: Mauna Loa's 1949 Summit Eruption

Aerial view of the pumice and cinder cone (center) built on Mauna Loa's southwest caldera wall during the 1949 summit eruption. A blanket of light-brown pumice, erupted from high lava fountains and blown west of the cone, is still visible today (top). Lava flowing eastward from the fountains formed the dark lava cone east of the pumice and cinder cone (lower right).