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The active episode 61 pāhoehoe flows of Pu‘u ‘Ō‘ō.

Without the dramatic flourish of recent events, lava is quietly erupting from Kīlauea's newest fissure, which opened September 21 on the east rim of...

On October 19, 2011, a magnitude-4.5 earthquake struck on the northwest flank of Mauna Kea at 2:10 p.m., HST, followed by more than 50 aftershocks...

High aerial view of the active lava channel of Pu‘u ‘Ō‘ō crater.

Above Hilo’s iconic Rainbow Falls on the Wailuku River is Boiling Pots. This area, named for the many "potholes" in the river bed, churns and roils...

HAWAI‘I ISLAND, Hawai‘i — The U.S. Geological Survey's Hawaiian Volcano Observatory (HVO) recorded a magnitude-4.5 earthquake located beneath the...

What a difference a century (or even a few years) can make! As noted in an earlier Volcano Watch (June 5, 2011), 1911 was a dynamic year for science...

The active pāhoehoe flows of Pu‘u ‘Ō‘ō.

One hundred years ago, Frank Perret, world-famous volcanologist, was watching the lava lake action in Halema‘uma‘u Crater. Honolulu businessmen and...

Over the past three years we've witnessed two large earthquake swarms at Yellowstone (2010 and 2009). Recent history tells us that these earthquake...