Hualalai, Hawaii (19.7N, 155.8W)
Elevation: 8,278 feet (2,523 m)
Hualalai is the westernmost shield volcano on the
Island of Hawaii. Three rifts radiate to the north, south, and
northwest. The shield-building stage was completed by 120,000 years
ago. About 105,000 years ago a trachyte cone, Puu Waawaa, formed on the north rift and generated flows
that traveled about 6 miles (10 km). Post-shield volcanism began
100,000 years ago and covered the entire surface of the volcano. The
most recent eruptions of Hualalai occurred in 1800-1801. Two large flows
reached the ocean. The Kona airport is built on the 1801 flow. This
view of the volcano is to the southeast and shows the 1800-1801 lava
flows. The long slope of the flank of Mauna Loa volcano is in the
background. Photograph by David Clague.
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