Volcano Watch

During the past week, we have been keeping a close watch on the Northern Mariana Islands (NMI), as seismometers on the islands record high levels of...

The Kahauale‘a 2 lava flow, fed by a vent on the northeast edge of the Pu‘u ‘Ō‘ō crater, is currently the only active flow along Kīlauea Volcano's...

When Mount St. Helens reawakened in late September 2004 with an intense swarm of earthquakes and very noticeable uplift of the volcano's crater floor...

April is again Tsunami Awareness Month in the State of Hawaii. As in previous years, groups across the state are conducting exercises and other...

Every year about this time, we write about the chemistry of lava erupting from Kīlauea Volcano.

March marks the anniversary of the most recent eruption of Mauna Loa, which began on March 25, 1984. It also reminds us of a much more destructive...

March 25 is the 30th anniversary of the most recent eruption of Mauna Loa, Hawai‘i island's largest volcano.

Six years is a blink of an eye in geologic time, but it can fly by for people, too. In a way, it doesn't seem very long ago that the summit eruption...

March 5, 2014, marked the third anniversary of the onset of Kīlauea Volcano's four-day-long Kamoamoa fissure eruption. This brief episode marked the...

Soon after a large earthquake occurs, the USGS Hawaiian Volcano Observatory publicizes the preliminary location and magnitude. Have you ever wondered...