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Daily updates about ongoing eruptions, recent images and videos of summit and East Rift Zone volcanic activity, maps, and data about recent earthquakes in Hawaii are posted on the HVO website. 

Volcano Watch is a weekly article and activity update written by U.S. Geological Survey Hawaiian Volcano Observatory scientists and colleagues.

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Volcano Watch — Celebrating colossal Mauna Loa with a "Hi-yo, Silver!"

Volcano Watch — Celebrating colossal Mauna Loa with a "Hi-yo, Silver!"

This past Wednesday marked the silver anniversary of Mauna Loa's most recent eruption.

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USGS HVO Press Release — Silver Anniversary of 1984 Mauna Loa Eruption

USGS HVO Press Release — Silver Anniversary of 1984 Mauna Loa Eruption

The 25th anniversary of Mauna Loa's last eruption is tomorrow—Wednesday, March 25.

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Volcano Watch — Alaska's Redoubt Volcano Keeping Scientists and Public on Guard

Volcano Watch — Alaska's Redoubt Volcano Keeping Scientists and Public on Guard

When strong volcanic tremor (continuous shaking of the ground) was recorded beneath Redoubt volcano January 23 to 25, scientists of the Alaska Volcano...

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Volcano Watch — After One Year, Kīlauea's Summit Eruption is Still Going Strong

Volcano Watch — After One Year, Kīlauea's Summit Eruption is Still Going Strong

It seems like only yesterday when the Hawaiian Volcano Observatory (HVO) monitored a several-week build-up in seismic tremor levels and sulfur dioxide...

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USGS HVO Press Release — Magnitude-4.0 Earthquake off the Northeast Coast of Hawai‘i Island

USGS HVO Press Release — Magnitude-4.0 Earthquake off the Northeast Coast of Hawai‘i Island

A magnitude-4.0 earthquake was located off the northeast coast of Hawai‘i Island by the U.S. Geological Survey's Hawaiian Volcano Observatory on...

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Volcano Watch — Why all the fuss about Mauna Loa this month?

Volcano Watch — Why all the fuss about Mauna Loa this month?

As noted in Volcano Watch a few weeks ago, this month marks the 25th anniversary of Mauna Loa's most recent eruption—a 22-day event that began on...

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Volcano Watch — Size Matters When It Comes to Volcanic Islands

Volcano Watch — Size Matters When It Comes to Volcanic Islands

The Island of Hawai`i, a composite of five volcanoes, has a surface area almost twice as large as the other main Hawaiian Islands combined.

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Volcano Watch — Good Vibrations—the Earth's Music

Volcano Watch — Good Vibrations—the Earth's Music

When an earthquake occurs, why do we feel the ground shake? The shaking we feel is from seismic waves radiating away from the earthquake. These waves...

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Volcano Watch — Nobody's Talking About the 800-pound Gorilla of Hawaiian Volcanoes

Volcano Watch — Nobody's Talking About the 800-pound Gorilla of Hawaiian Volcanoes

March 25 marks the 25th anniversary of the most recent eruption of Mauna Loa volcano.

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Volcano Watch — Quiescence in 1913 is Similar to 2008 Events

Volcano Watch — Quiescence in 1913 is Similar to 2008 Events

In most sciences, processes are investigated by identifying the factors that affect them and varying each factor, in turn, to determine its...

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Volcano Watch — Seasonally Enhanced Aroma Briefly Fills the Air Near Halema`uma`u

Volcano Watch — Seasonally Enhanced Aroma Briefly Fills the Air Near Halema`uma`u

It seems that something new and different is always cooking at Kīlauea.

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Volcano Watch — There Were Technological Leaps in Volcano Watching, Even 75 Years Ago

Volcano Watch — There Were Technological Leaps in Volcano Watching, Even 75 Years Ago

By the time Babe Ruth had played baseball with the Waiakea Pirates and planted a banyan tree in Hilo in late October, 1933, enough strong earthquakes...

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