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Volcano Watch — When will Halemaʻumaʻu fill with lava?

Volcano Watch — When will Halemaʻumaʻu fill with lava?

USGS Hawaiian Volcano Observatory (HVO) staff are often asked, “Will lava erupted during the ongoing Kīlauea summit eruption in Halemaʻumaʻu...

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What’s that smell? Tracking Yellowstone’s hydrocarbon history

What’s that smell? Tracking Yellowstone’s hydrocarbon history

Hydrocarbons in Yellowstone?  Yes indeed, there are oil seeps in the northeastern part of the park! These seeps are a consequence of the region’s long...

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Photo & Video Chronology — Kīlauea summit monitoring overflight

Photo & Video Chronology — Kīlauea summit monitoring overflight

On Tuesday, July 7, USGS Hawaiian Volcano Observatory geologists completed a brief monitoring helicopter overflight of Halema‘uma‘u crater at the...

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Yellowstone’s phantom, sometimes mythical, Howard Eaton Trail

Yellowstone’s phantom, sometimes mythical, Howard Eaton Trail

The Howard Eaton Trail, once spanning 157 miles, was the longest hiking and equestrian trail in Yellowstone National Park for nearly 50 years. Today...

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Photo & Video Chronology — Kīlauea summit tephra sampling

Photo & Video Chronology — Kīlauea summit tephra sampling

On July 2, three USGS Hawaiian Volcano Observatory scientists flew via helicopter to the northwest side of Halema‘uma‘u at the summit of Kīlauea to...

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Volcano Watch — Hawaii Five-O! Fifty fountaining episodes at Kīlauea summit

Volcano Watch — Hawaii Five-O! Fifty fountaining episodes at Kīlauea summit

Hawaii, the 50th state, reached a golden anniversary last Saturday, June 27. Surprise, it’s the 50th fountaining episode of the ongoing episodic...

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What do Yellowstone and the 2026 FIFA Men’s World Cup have in common? Heat maps!

What do Yellowstone and the 2026 FIFA Men’s World Cup have in common? Heat maps!

Heat is everywhere—from the boiling hot springs and fumaroles of Yellowstone to the fast-paced action of the 2026 FIFA Men’s World Cup.  In both...

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Volcano Watch — A hui hou to a giant of volcanology

Volcano Watch — A hui hou to a giant of volcanology

In 2025, Professor Bruce Houghton retired from the University of Hawaiʻi at Mānoa after 25 years as the Gordon A. Macdonald Chair of Volcanology. He...

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Photo & Video Chronology — Kīlauea summit monitoring overflight

Photo & Video Chronology — Kīlauea summit monitoring overflight

USGS Hawaiian Volcano Observatory scientists conducted a misty monitoring overflight of Halemaʻumaʻu at Kīlauea summit on June 24, 2026. 

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Oops, it did it again: Another small hydrothermal explosion at Biscuit Basin

Oops, it did it again: Another small hydrothermal explosion at Biscuit Basin

Early on the morning of Saturday, June 13, 2026, a small hydrothermal explosion occurred at Biscuit Basin in Yellowstone National Park. Although...

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Volcano Watch — What is the difference between an eruption and an episode?

Volcano Watch — What is the difference between an eruption and an episode?

Over the last year and a half, the historic episodic eruption at the summit of Kīlauea has had 49 episodes of lava fountaining, with episode 50 in the...

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Photo & Video Chronology — Kīlauea summit eruption episode 49

Photo & Video Chronology — Kīlauea summit eruption episode 49

Episode 49 of lava fountaining during the ongoing Halemaʻumaʻu eruption at the summit of Kīlauea took place for 7.5 hours on June 14. The eruption is...

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