Volcano Watch

Gravimeters, essentially extremely precise pendulums, can measure a change in the force of gravity to one-in-one billionth of the force you feel every...

It is no secret that the Island of Hawaiʻi is home to fantastic volcanic features, many of which have been created during eruptions of Kīlauea, Mauna...

The USGS Hawaiian Volcano Observatory (HVO) uses dozens of seismometers to locate individual earthquakes and identify signals that are related to...

One of the most interesting aspects of the current activity in Halemaʻumaʻu is the occasional oozing of lava around the edges of the entire crater...

A new project at the USGS Hawaiian Volcano Observatory (HVO) is once again making use of old aerial photographs and field notes that were used to make...

Ocean swells occur continuously around the world. As these swells rise and fall, they couple with the ocean floor below them creating a constant...

Mauna Loa has been in the news lately, as the volcano continues to awaken from its slumber. While an eruption of Mauna Loa is not imminent, now is the...

Pele returned to the summit of Kīlauea on the evening of December 20, 2020. Incredible video documents the start of the new eruption in Halema‘uma‘u...

“When will Mauna Loa erupt next?” This was the title of a Volcano Awareness Month video presentation released by the USGS Hawaiian Volcano Observatory...

Kīlauea’s current lava lake formed on December 20th and rose rapidly within Halema‘uma‘u crater during the dynamic first week of the ongoing summit...