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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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The fascinating history of Imperial Geyser

The fascinating history of Imperial Geyser

In the far southwest corner of Lower Geyser Basin is Imperial Geyser—a colorful pool that is also a perpetual spouter.  The feature seems to have...

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Volcano Watch — Remembering the 1926 Mauna Loa eruption a century later

Volcano Watch — Remembering the 1926 Mauna Loa eruption a century later

April marked the 100-year anniversary of Mauna Loa’s 1926 Southwest Rift Zone eruption. This eruption is most remembered for the destruction of Ho...

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Young mountains, old rocks: A geological overview of the Teton range

Young mountains, old rocks: A geological overview of the Teton range

The Teton Range, just south of Yellowstone National Park, is the youngest mountain range in the Rockies, and possibly North America. The forces that...

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Volcano Watch — “Stick Season” in Hawaii? What Happened to the Leaves around Kīlauea Summit?

Volcano Watch — “Stick Season” in Hawaii? What Happened to the Leaves around Kīlauea Summit?

As you walk along Crater Rim Trail from Wahinekapu (Steaming Bluffs) heading towards the Uēkahuna overlook in Hawaiʻi Volcanoes National Park, you’ll...

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Photo & Video Chronology — Episode 48 at Kīlauea summit, a new record

Photo & Video Chronology — Episode 48 at Kīlauea summit, a new record

Episode 48 of lava fountaining in Halemaʻumaʻu at the summit of Kīlauea  happened on June 1, 2026. Lava fountained from the north vent, reaching a...

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Beyond Yellowstone’s boardwalks: A glimpse into the remote caldera systems of Alaska

Beyond Yellowstone’s boardwalks: A glimpse into the remote caldera systems of Alaska

Where in the U.S. can you find the highest concentration of recently (<12,000 years ago) formed calderas? Hint: it’s not in Yellowstone, or even the...

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Volcano Watch — What caused the shake up on Friday night?

Volcano Watch — What caused the shake up on Friday night?

More than 7,000 people across the State of Hawaii submitted “Did You Feel It?” (DYFI) reports to the U.S. Geological Survey (USGS) after the magnitude...

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Beyond the bathroom: Top visitor questions in Yellowstone’s thermal areas

Beyond the bathroom: Top visitor questions in Yellowstone’s thermal areas

With the arrival of Memorial Day and the unofficial start of the summer travel season, we take a look at the most common questions that visitors to...

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Photo & Video Chronology — Kīlauea summit overflight

Photo & Video Chronology — Kīlauea summit overflight

USGS Hawaiian Volcano Observatory scientists conducted a monitoring overflight of Kīlauea summit on May 22, 2026. Forecast models suggest that episode...

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Happy 25th Birthday YVO!

Happy 25th Birthday YVO!

The Yellowstone Volcano Observatory is turning 25 years old!  Surprisingly, the seeds for the observatory were planted at Lassen Volcanic National...

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Photo & Video Chronology — May 14, 2026 — Kīlauea episode 47

Photo & Video Chronology — May 14, 2026 — Kīlauea episode 47

Episode 47 of the ongoing Halemaʻumaʻu eruption at the summit of Kīlauea lasted for 9 hours, from 3:27 p.m. HST on May 14, 2026, until 12:27 a.m. HST...

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