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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 — Ancient volcanoes are critical to our modern world, and our future

Volcano Watch — Ancient volcanoes are critical to our modern world, and our future

If you’ve read “Volcano Watch” articles before, you can probably list several reasons that scientists study volcanoes. However, there is another...

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Volcano Watch — Remembering a destructive Mauna Loa eruption 75 years ago

Volcano Watch — Remembering a destructive Mauna Loa eruption 75 years ago

Lava fountains at the summit of Kīlauea have been shining a spotlight on Hawaii’s most active volcano but let us not forget the larger one looming in...

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Volcano Watch — Snowshoeing on Kīlauea? High fountain episodes pose new challenges to volcano monitoring

Volcano Watch — Snowshoeing on Kīlauea? High fountain episodes pose new challenges to volcano monitoring

The USGS Hawaiian Volcano Observatory (HVO) maintains a network of nearly 150 monitoring instruments on Kīlauea, which track activity above and below...

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Volcano Watch — So what on Earth (or at least on Kīlauea) is a “gas piston”?

Volcano Watch — So what on Earth (or at least on Kīlauea) is a “gas piston”?

If you’ve been following the ongoing eruption of Kīlauea, you may have seen the terms "gas piston" or "gas pistoning" show up in some of the USGS...

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Volcano Watch — Where does Kīlauea tephra go? The answer is blowin' in the wind

Volcano Watch — Where does Kīlauea tephra go? The answer is blowin' in the wind

The spectacular series of Kīlauea eruption episodes over the past six months has been remarkably safe for public viewing, but a simple change in the...

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Volcano Watch — School's out for Summer: Introducing New Interns at HVO!

Volcano Watch — School's out for Summer: Introducing New Interns at HVO!

As another school year ends, the USGS Hawaiian Volcano Observatory (HVO) welcomes two new summer interns: Kamalani Poepoe and Ruth Gale. With an...

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Volcano Watch — Six Months of Halemaʻumaʻu Lava Fountains

Volcano Watch — Six Months of Halemaʻumaʻu Lava Fountains

There is much to appreciate about the ongoing Kīlauea summit eruption as it approaches its 6-month anniversary on June 23. The stunning episodic lava...

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Volcano Watch — What Fans the Flames Observed at Volcanic Vents?

Volcano Watch — What Fans the Flames Observed at Volcanic Vents?

Recently, something has been observed “dancing” above the active eruptive vents inside Halemaʻumaʻu…Hydrogen flames! Let’s take a look into what...

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Volcano Watch — Halemaʻumaʻu Eruption Reaches New Heights as HVO Updates Volcano Alert Notifications

Volcano Watch — Halemaʻumaʻu Eruption Reaches New Heights as HVO Updates Volcano Alert Notifications

Episode 23 of Kīlauea's ongoing eruption within Halemaʻumaʻu occurred on Sunday, May 25, 2025. Record-setting lava fountain and plume heights were...

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Volcano Watch — Inter-Episode Rumblings at Kīlauea

Volcano Watch — Inter-Episode Rumblings at Kīlauea

Witnessing a volcanic eruption is, for many, a once-in-a-lifetime experience. Hawaiʻi Volcanoes National Park welcomes well over a million visitors...

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Volcano Watch — What lurks beneath: learning from lava ooze outs

Volcano Watch — What lurks beneath: learning from lava ooze outs

Halemaʻumaʻu has been progressively filled by six eruptions at the summit of Kīlauea since 2020, and it continues to accumulate new lava with each...

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Volcano Watch — Twenty episodes and counting: lava fountains continue in Halemaʻumaʻu

Volcano Watch — Twenty episodes and counting: lava fountains continue in Halemaʻumaʻu

On December 23, 2024, eruptive activity at Kīlauea’s summit began again with the first in what has become 20 discrete lava fountaining episodes. Many...

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