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In 1880–1881, a lava flow from Mauna Loa came very close to entering Hilo Bay.

A nuée ardente is a turbulent, fast moving cloud of hot gas and ash erupted from a volcano. 

As the 2016 Volcano Awareness Month comes to an end, so too does our series of "Volcano Watch" articles exploring the geology of the Hawaiian Islands...

As part of Volcano Awareness Month, our January "Volcano Watch" articles are taking us on a geologic tour of the Hawaiian Islands. Today's stop: Maui...

Scattered breakouts northeast of Pu‘u ‘Ō‘ō; clear views in Pu‘u ‘Ō‘ō Crater

January is Volcano Awareness Month, during which our "Volcano Watch" articles are exploring the geology of the Hawaiian Islands. The series continues...

USGS scientists often determine the age of volcanic rocks with dating techniques that involve radioactive decay of elements like uranium and argon.

Early morning explosive event at Kīlauea summit lava lake

Welcome to the 7th annual Volcano Awareness Month on the Island of Hawai‘i!

Halema‘uma‘u lava lake