Hawaii Volcano Blog

Thursday, November 25, 2021

VOLCANO WATCH: The refilling of Halemaʻumaʻu crater

Halemaʻumaʻu crater has undergone repeated changes during the past two centuries. 
Friday, November 19, 2021

30 Years of Volcano Watch

David Clague, former HVO Scientist-In-Charge, initiated this series of weekly articles in late-1991.
Thursday, November 11, 2021

Volcano Watch: Tracking Magma Movement Using Olivine Crystal ‘Clocks’

Lavas and their minerals erupted from Hawaiian volcanoes provide clues to the history of the magmas that are eventually erupted.
Friday, November 05, 2021

Volcano Watch: Alaska Volcano Elusive in Signs of Unrest

Pavlof Volcano, Alaska’s stratovolcano, located within the Aleutian volcanic arc, has remained elusive in yielding clues to impending eruption.
Thursday, October 28, 2021

Volcano Watch: How High is That Lava Fountain?

The onset of an eruption is frequently the most dynamic and vigorous period, requiring a quick evaluation of potential hazards.
Thursday, October 21, 2021

VOLCANO WATCH: The Canary Islands ‘Mega-Tsunami’ Hypothesis And Why it Doesn’t Carry Water

The recent eruption on La Palma, in the Canary Islands, has stimulated speculation that the volcano might collapse, creating a tsunami that would devastate the east coast of North and South America. But is such a scenario possible or likely?
Friday, October 15, 2021

Volcano Watch: Large Earthquake reminds us to ‘Drop, Cover, and Hold On’

The large earthquake, caused by bending of the oceanic plate, serves as a stark reminder that the State of Hawaiʻi is no stranger to potentially damaging earthquakes.
Friday, October 08, 2021

What’s That Rising From the Lava Lake?

Recent activity at Kīlauea has USGS Hawaiian Volcano Observatory (HVO) scientists reflecting on prior observations and how they compare to recent activity.
Monday, October 04, 2021

Eruption Update: Kīlauea Calming Down

HVO scales back warning levels at eruption site due to new data Monday.
Wednesday, September 29, 2021

Kīlauea Awakens as New Eruption Commences Wednesday

Kīlauea volcano has stirred awake yet again.
Friday, September 24, 2021

Observations and Impacts of the 2017–18 Ambae, Vanuatu Eruption

The island of Ambae, in Vanuatu, is a large basaltic shield volcano that lies along the subduction zone between Fiji and Papua New Guinea in the South Pacific.
Saturday, September 18, 2021

Volcano Watch: How Does HVO Determine Regions Most Threatened by Lava Flows?

Most residents of the Island of Hawaiʻi live on one of four potentially active volcanoes and probably have wondered about the threat of lava flows at one time or another. 
Sunday, September 12, 2021

Volcano Watch: Mapping Kīlauea’s Gas Emissions

Over the summer of 2021, USGS Hawaiian Volcano Observatory (HVO) scientists conducted a detailed gas survey of the caldera floor and rim in order to understand the distribution of current emissions.
Saturday, September 04, 2021

Eruption? Intrusion? What’s the difference?

HVO explains the difference between an intrusion and eruption following a flurry of activity south of the Kīlauea caldera a week ago.
Friday, August 27, 2021

Volcano Watch: New Kīlauea Summit Intrusion Draws Comparison to Past Activity

Late Monday afternoon, earthquake activity picked up at Kīlauea’s summit.
Thursday, August 26, 2021

Kīlauea Update: Earthquake Swarm has Waned

The earthquake swarm that began beneath the south part of Kīlauea caldera, within Hawaiʻi Volcanoes National Park has waned.
Saturday, August 21, 2021

Volcano Watch: ‘Ailā‘au—the Largest Subaerial Kīlauea Lava Flow

Kīlauea volcano alternates between periods dominated by lava flows, such as the one we are currently in, and periods of explosive activity.
Friday, August 13, 2021

Volcano Watch: 1790 Was a Bad Year at Kīlauea

More people were probably killed by the 1790 eruption of Kīlauea than by any other eruption in what is now the United States.
Friday, August 06, 2021

Spaceborne Sentinel Keeps Watch Over Hawaiian Volcanoes

Many imaging satellites are polar orbiting, staying closer to Earth’s surface in a low orbit.
Thursday, July 29, 2021

VOLCANO WATCH, Under the Radar: Using Weather Stations to Study Kīlauea’s Plume

The water lake in Halema‘uma‘u was 164 feet deep and growing when Kīlauea summit erupted on Dec. 20.
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