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View from just below the summit of Mauna Loa looking back down the ...
May 23, 2011

View from just below the summit of Mauna Loa looking back down the ...

View from just below the summit of Mauna Loa looking back down the Southwest Rift. The Sulfur Cone is the white area just above center frame. Pu‘u o Keokeo is the barely visible bump just above Sulfur Cone at the crest of the Southwest Rift.

View looking downslope at the various cones that dot Mauna Loa's No...
May 23, 2011

View looking downslope at the various cones that dot Mauna Loa's No...

View looking downslope at the various cones that dot Mauna Loa's Northeast Rift Zone. The edge of North Pit, on the north side of Moku‘āweoweo, is in the foreground.

View from above Mauna Loa's upper Northeast Rift Zone looking acros...
May 23, 2011

Mauna Loa looking across an unnamed cone toward Mauna Kea

View from above Mauna Loa's upper Northeast Rift Zone looking across an unnamed cone toward Mauna Kea.

Shield-volcano Mauna Kea viewed from the northern slope of Mauna Lo...
May 23, 2011

Shield-volcano Mauna Kea viewed from the northern slope of Mauna Lo...

Shield-volcano Mauna Kea viewed from the northern slope of Mauna Loa (cinder cones in the foreground) shows off its broad shield shape. The bumps on its profile are large cinder cones.

The high point of Mauna Loa, in the background at an elevation of a...
May 23, 2011

The high point of Mauna Loa, in the background at an elevation of a...

The high point of Mauna Loa, in the background at an elevation of about 13,679 ft, is actually just the highest point along the rim of the steep cliffs that surround Mauna Loa's summit caldera, Moku‘āweoweo, Dark-colored lava flows of recent vintage (1984) cover the floor of Moku‘āweoweo. View is looking southwest.

This view of Mauna Loa's summit is looking toward the northeast. Th...
May 23, 2011

This view of Mauna Loa's summit is looking toward the NE. The east ...

This view of Mauna Loa's summit is looking toward the northeast. The east flank of Mauna Kea is to the left, and North Pit, on the northeast end of Moku‘āweoweo, is straight ahead.

This view of Mauna Loa's 1940 vent cone, looking to the southwest, ...
May 23, 2011

This view of Mauna Loa's 1940 vent cone, looking to SW, shows a fis...

This view of Mauna Loa's 1940 vent cone, looking to the southwest, shows a fissure that bisected it during the 1984 eruption (crack on the right side of the cone). pāhoehoe flows and spatter erupted from the 1984 fissure blanket the caldera floor northwest of the cone (foreground).

A close-up view of the 1984 fissure that cut through the southwest ...
May 23, 2011

1984 fissure that cut through the SW side of Mauna Loa's 1940 vent ...

A close-up view of the 1984 fissure that cut through the southwest side of Mauna Loa's 1940 vent cone. The crack on the right side of the cone is the 1984 fissure.

Aerial view of Mauna Loa's upper northeast rift zone near the area ...
May 23, 2011

Mauna Loa's upper northERZ near area where it intersects Moku‘āweow...

Aerial view of Mauna Loa's upper northeast rift zone near the area where it intersects Moku‘āweoweo, the summit caldera. pāhoehoe flows visible in the foreground were erupted in 1942. Distant steep cliffs (right background) are the west wall of the summit caldera.

Spectacular views of the summit caldera of Mauna Loa...
May 23, 2011

Spectacular views of the summit caldera of Mauna Loa

A view of Moku‘āweoweo, the summit caldera of Mauna Loa, as seen from South Pit (looking to the north-northwest). An eruption in 1940 created the cinder-and-spatter cone visible on the caldera floor (right center). This cone, which is about 114 m (373 feet) high, is the largest cone at Mauna Loa's summit. The cone on the southwest rim of the caldera (left center) was built

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This aerial view of Mauna Loa's summit shows the cinder-cone and la...
May 23, 2011

This Mauna Loa's summit shows the cinder-cone and lava flows that w...

This aerial view of Mauna Loa's summit shows the cinder-cone and lava flows that were erupted in 1949. The crack extending down the left side of the cone is the northeast-southwest trending 1984 fissure that bisected the southwest flank of the cone during the initial phase of the eruption. Light-brown tephra erupted from the 1949 cone thins to the west. The steep caldera

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An aerial view of the 1940 cinder-and-spatter cone on the floor of ...
May 23, 2011

An the 1940 cinder-and-spatter cone on the floor of Mauna Loa's sum...

An aerial view of the 1940 cinder-and-spatter cone on the floor of Mauna Loa's summit caldera as seen from the southeast. The west wall of the caldera (background) is about 170 m (560 feet) high. Most of the caldera floor around the cone is covered by lava flows erupted in 1984.