Volcano Watch

Do you want to know which volcanoes in the United States are erupting? Or which volcanoes are showing signs of activity which may lead to an eruption?

William Ellis led a team of missionaries on a tour of the Island of Hawai‘i starting on July 18, 1823, from the village of Kailua. Their trip took...

This year, two days before America’s Independence Day fireworks celebrations began, a remarkably different “rocket’s red glare” was seen at Vandenberg...

For the past year, the Kahauale‘a 2 lava flow was erupting from a vent high on the northeast crater rim of Pu‘u ‘Ō‘ō, on Kīlauea's East Rift Zone...

A few weeks ago, a Volcano Watch article recounted the advance of Mauna Loa lavas on the town of Hilo in 1855.

For the past several years, the amount of lava erupting from Kīlauea's East Rift Zone has been well below the long-term output rate established...

After a 30-year repose, Mauna Loa may be slowly stirring to life. While there are no signs of impending eruption, the Hawaiian Volcano Observatory...

On the evening of August 11, 1855, Mauna Loa erupted from a location described as 1,000 to 2,000 ft below the summit of the volcano. This was the...

Hawai‘i County is the fastest-growing region in the State of Hawaii. Its relatively inexpensive real estate, along with population growth, spurs more...

The recent anniversary of Kīlauea's May 1924 explosive summit eruptions reminds us of the sometimes violent interactions that occur when relatively...

Landslides are hazards in areas where slopes are steep. The degree of the hazard depends on the type of rocks that make up the slope. Large landslides...

Ninety years ago this month, Kīlauea was exploding.

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...