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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 — What a day! Eruptions, earthquakes, and a lower lava lake

Volcano Watch — What a day! Eruptions, earthquakes, and a lower lava lake

The USGS Hawaiian Volcano Observatory was unable to issue "Volcano Watch" by its regular Thursday deadline on May 3 due to unfolding events on Kīlauea...

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Volcano Watch — A busy time at Kīlauea Volcano’s summit and East Rift Zone

Volcano Watch — A busy time at Kīlauea Volcano’s summit and East Rift Zone

The past few weeks have been exciting for volcano watchers on the Island of Hawai‘i, especially for visitors to Hawai‘i Volcanoes National Park’s...

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Volcano Watch — Do recent changes herald the opening of a new vent on Pu‘u ‘Ō‘ō?

Volcano Watch — Do recent changes herald the opening of a new vent on Pu‘u ‘Ō‘ō?

In recent years, scientists have made significant improvements in developing sophisticated models of how volcanoes work. The ultimate goal is to...

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Volcano Watch — Explosive eruptions at the summit of Mauna Loa: When did they occur?

Volcano Watch — Explosive eruptions at the summit of Mauna Loa: When did they occur?

Three deposits from explosive eruptions at the summit of Mauna Loa are located west, northwest, and east of Moku‘āweoweo, the volcano's summit caldera...

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Volcano Watch — Disaster strikes Ka‘ū in 1868: The rest of the story

Volcano Watch — Disaster strikes Ka‘ū in 1868: The rest of the story

Already reeling from a destructive earthquake and deadly tsunami and mud flow on April 2, 1868, Ka‘ū residents on the Island of Hawai‘i hoped for a...

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Volcano Watch — Seismic event devastated Ka‘ū 150 years ago

Volcano Watch — Seismic event devastated Ka‘ū 150 years ago

This week marks 150 years since the largest earthquake to strike Hawaii in the last two centuries. Estimated to have been at least magnitude-7.9, this...

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Volcano Watch — Antarctic-volcano radar system visits Halema‘uma‘u

Volcano Watch — Antarctic-volcano radar system visits Halema‘uma‘u

A recent issue of Volcano Watch [https://volcanoes.usgs.gov/hvo/hvo_volcano_watch.html?vwid=1232] looked at what the level of the lava lake within...

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Volcano Watch — Kīlauea Volcano’s summit eruption is now a decade old

Volcano Watch — Kīlauea Volcano’s summit eruption is now a decade old

A little more than ten years ago, conditions around Kīlauea Volcano's summit were much different than today. The caldera floor was open to the public...

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Volcano Watch — Is the current summit eruption a return to Kīlauea Volcano's past?

Volcano Watch — Is the current summit eruption a return to Kīlauea Volcano's past?

To set the stage for next week's Volcano Watch about the upcoming anniversary of Kīlauea Volcano's current summit eruption, this week we revisit the...

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Volcano Watch — Monitoring Hawaiian volcanoes requires a diversified toolkit

Volcano Watch — Monitoring Hawaiian volcanoes requires a diversified toolkit

Most people likely know that the USGS Hawaiian Volcano Observatory (HVO) uses seismometers and Global Positioning System (GPS) receivers for...

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Volcano Watch — Slow slip event on Kīlauea Volcano’s south flank is expected this year

Volcano Watch — Slow slip event on Kīlauea Volcano’s south flank is expected this year

Today's Volcano Watch begins with a question: Can you guess when the next slow slip event will happen on Kīlauea Volcano's South Flank? As a hint, the...

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Volcano Watch — Why are HVO scientists talking so much about Mauna Loa?

Volcano Watch — Why are HVO scientists talking so much about Mauna Loa?

In recent weeks, the USGS Hawaiian Volcano Observatory (HVO) joined forces with several other agencies to talk about Mauna Loa at community events and...

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