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The pali (cliffs) of Kīlauea's south flank are some of the volcano's most striking features. Reaching up to 500 m (1500 ft) high, they stand out...

Halema‘uma‘u water pond on August 27

Water pond at the bottom of Halema‘uma‘u still growing

On July 25, 2019, a helicopter pilot flying a U.S.Geological Survey mission over Kīlauea noticed an unusual green patch at the bottom of Halema‘uma‘u...

Halema‘uma‘u water pond on August 25

Southern wall of Kīlauea Caldera

Overflight of Kīlauea summit

The U.S. Geological Survey's Hawaiian Volcano Observatory (HVO) recorded an offshore magnitude-4.2 earthquake south of the Island of Hawai‘i on...

Last month, the entire world celebrated the 50th anniversary of Apollo 11's triumphant flight to the moon and the first human footsteps on the surface...

HVO geophysicist Jim Kauahikaua discusses the water pond in Halema‘uma‘u and what it means.