News

Kīlauea began erupting explosively 100 years ago this week, for the first time in nearly a century. The eruption lasted for about 17 days, killing one...

The record of water chemistry data in Yellowstone predates the development of the pH (acidity) scale!  These data are a testament to numerous...

In 2018, a large eruption from the lower East Rift Zone of Kīlauea partially drained the summit magma reservoir, which caused portions of the...

This past week, earthquakes and inflation near Kīlauea’s summit prompted temporary closures within Hawaiʻi Volcanoes National Park. What is happening...

Is Yellowstone heating up, or cooling down?  How much heat is radiating away from the surface in Yellowstone’s thermal areas, and how does it change...

On April 24, HVO staff installed a new webcam and upgraded an existing webcam on the Southwest Rift Zone of Mauna Loa. 

Have you ever wondered if Yellowstone’s hydrothermal system is affected by the amount of precipitation or the annual temperature? It turns out that...

Earth’s magnetic field surrounds us every second of the day, everywhere on the planet. Anyone who has picked up a pocket compass and seen the magnetic...

Just south of Norris Geyser Basin is a little-visited thermal area called Monument Geyser Basin. The “monuments” there are unique in Yellowstone’s...

Geologists study the rock record to understand how our world came to be and to try to determine what geologic events might occur in the future. The...