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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 — Mauna Loa rumbled and stretched as it awakened from a 25-year slumber

Volcano Watch — Mauna Loa rumbled and stretched as it awakened from a 25-year slumber

Shortly before midnight on July 5, 1975, a hiker sleeping in Pu‘u‘Ula‘ula (Red Hill) Cabin on the northeast flank of Mauna Loa awoke and saw a faint...

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Volcano Watch — Asphalt Volcanoes: Where the Lava Meets the Road?

Volcano Watch — Asphalt Volcanoes: Where the Lava Meets the Road?

On the Island of Hawai‘i, the only time people think of volcanoes and asphalt together is when an active lava flow crosses the road (cue "Why did the...

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Volcano Watch — Is That an Accelerometer in Your Pocket?

Volcano Watch — Is That an Accelerometer in Your Pocket?

Thanks to relatively recent advances in technology, many portable digital devices now have accelerometers embedded in them.

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Volcano Watch — Dealing with Hazards is a Risky Business

Volcano Watch — Dealing with Hazards is a Risky Business

Volcanic hazards come in many forms. The most common hazards for Hawai`i include earthquakes, lava flows, and wide-ranging vog. What is the definition...

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Volcano Watch — Should Maui residents be concerned about lava flows?

Volcano Watch — Should Maui residents be concerned about lava flows?

Molten lava flows downhill. This simple fact has spurred many residents on the Island of Hawai‘i, where Kīlauea Volcano has been erupting for more...

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Volcano Watch — Petrologic Monitoring of Kīlauea Volcano: An update for "Rockhounds"

Volcano Watch — Petrologic Monitoring of Kīlauea Volcano: An update for "Rockhounds"

Petrology is literally the "study of rocks," and looking carefully at the rocks coming out of a volcano is necessary in order to understand what's...

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Volcano Watch — Kīlauea Volcano has been erupting for a long, long time

Volcano Watch — Kīlauea Volcano has been erupting for a long, long time

On May 21, 2010, Kīlauea Volcano's ongoing eruption reached a milestone:
10,000 days!

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Volcano Watch — Over the Edge, or the Webcam Takes a Plunge

Volcano Watch — Over the Edge, or the Webcam Takes a Plunge

At HVO's Monday meeting, geologist Tim Orr updated the staff on current eruption conditions at Kīlauea's summit, east rift zone vents and flow field.

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Volcano Watch — Europeans wanted cash, not ash, from Iceland!

Volcano Watch — Europeans wanted cash, not ash, from Iceland!

An Icelandic volcano was prominently featured in March and April's news, first for its gentle, tourist-friendly eruptions, and later for its...

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Volcano Watch — A Peculiar Flow from Sulphur Cone along Mauna Loa

Volcano Watch — A Peculiar Flow from Sulphur Cone along Mauna Loa

Volcano Watchers may pride themselves on having witnessed a variety of lava flows, but how many can say they've seen flowing molten sulfur? It happens...

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Volcano Watch — Is Kīlauea east rift eruption running out of gas?

Volcano Watch — Is Kīlauea east rift eruption running out of gas?

Regular visitors to HVO's daily update Web page might notice what seems like a minor change in one of Kīlauea two ongoing eruptions. While sulfur...

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Volcano Watch — NetQuakes Offer More Community Partnering in USGS Seismic Monitoring

Volcano Watch — NetQuakes Offer More Community Partnering in USGS Seismic Monitoring

Wednesday, April 14, 2010, 7:37 a.m., Hawaii Standard Time: "Uh. Oh, oh. Did you feel that? It felt like an earthquake."

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