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Volcano Watch

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

Filter Total Items: 1680
Volcano Watch — Once a big island, Maui County now four small islands

Volcano Watch — Once a big island, Maui County now four small islands

The four islands of Maui, Moloka`i, Lana`i, and Kaho`olawe were once all connected as a vast landmass known as Maui Nui, literally "big Maui." This...

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Volcano Watch — Measuring ground movements in the Koa`e fault system

Volcano Watch — Measuring ground movements in the Koa`e fault system

Kilauea has one of the most active fault systems in the world. The Koa`e fault system is 2-3 km (1.2-1.8 miles) wide and extends about 17 km (10 miles...

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Volcano Watch — April is tsunami awareness month throughout Hawai`i

Volcano Watch — April is tsunami awareness month throughout Hawai`i

About this time every year, we have an article or two on the topic of tsunami. The month of April is observed as "Tsunami Awareness Month" in Hawai`i...

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Volcano Watch — Why are Mount St. Helens' eruptions generally more explosive than those of Kīlauea?

Volcano Watch — Why are Mount St. Helens' eruptions generally more explosive than those of Kīlauea?

Residents of the Big Island have been living with the nearly continuous eruption of Kīlauea for a bit over 20 years. They have become familiar with...

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Volcano Watch — Viewing Hawai`i's lava safely - a reminder

Volcano Watch — Viewing Hawai`i's lava safely - a reminder

The recent serious injury incurred by a visitor to the Mother's Day lava flow field prompted this article. Shortly after midnight on March 10, a...

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Volcano Watch — Two eruptions at Kīlauea's summit in 1982 end an era

Volcano Watch — Two eruptions at Kīlauea's summit in 1982 end an era

The summit of Kīlauea has been quiet for more than 20 years. Pu`u `O`o and Kupaianaha have hogged the limelight since January 3, 1983. Two eruptions...

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Volcano Watch — Collecting Data on Earthquake Effects

Volcano Watch — Collecting Data on Earthquake Effects

One morning, you're awakened by a violent shaking of your bed; you hear the glass jalousies rattle, and the dog barks hysterically. In the seconds it...

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Volcano Watch — Active lava flows and new ocean entry provide prime viewing opportunities

Volcano Watch — Active lava flows and new ocean entry provide prime viewing opportunities

The past ten days have seen lava cross the Chain of Craters Road to form a new lava entry at the ocean's edge. Wildfires of the Panau Iki blaze...

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Volcano Watch — Monitoring Kīlauea's eruption: how close to the action is close enough?

Volcano Watch — Monitoring Kīlauea's eruption: how close to the action is close enough?

Hawai`i is often described as the ideal setting for studying active volcanic processes. After all, where else can you find a "drive in" volcano that...

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Volcano Watch — The Puhimau thermal area is gradually enlarging

Volcano Watch — The Puhimau thermal area is gradually enlarging

Little more than a mile down the Chain of Craters Road from Crater Rim Drive, a large tract of bare ground suddenly appears on the right, and curious...

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Volcano Watch — A Break From the Routine on Kīlauea

Volcano Watch — A Break From the Routine on Kīlauea

For more than twenty years, Kīlauea has been erupting almost continuously. In the early years, the eruption alternated between dramatic fountains and...

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Volcano Watch — Inflation of Mauna Loa Volcano slows

Volcano Watch — Inflation of Mauna Loa Volcano slows

The inflation of Mauna Loa Volcano that started last year appears to be slowing down. From May 2002 until very recently, continuously recording...

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