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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 — Tracking down Mauna Loa’s carbon dioxide

Volcano Watch — Tracking down Mauna Loa’s carbon dioxide

When lava poured out over the floor of Moku‘āweoweo, Mauna Loa’s summit caldera, late on the night of November 27, 2022, it was still many hours away...

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Volcano Watch — What is the highest elevation reached by Halemaʻumaʻu lava?

Volcano Watch — What is the highest elevation reached by Halemaʻumaʻu lava?

The 2018 collapse of southern Kaluapele (Kīlauea caldera) left a pit whose lowest point was about 500 m (1640 ft) above sea level (asl). Since 2020...

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Volcano Watch — Unveiling Earth's magnetic secrets: paleomagnetism and its geological applications

Volcano Watch — Unveiling Earth's magnetic secrets: paleomagnetism and its geological applications

When we think about the Earth's magnetic field, we often associate it with compasses and navigation. However, did you know that our planet's magnetic...

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Volcano Watch — Reflections of recent eruptions

Volcano Watch — Reflections of recent eruptions

Kīlauea volcano began erupting within Halema‘uma‘u crater at the summit during the early morning of June 7. The eruption marks another in a series of...

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Kīlauea Volcano Activity Notice — Status upgrade to ORANGE/WATCH, elevated unrest at the summit

Kīlauea Volcano Activity Notice — Status upgrade to ORANGE/WATCH, elevated unrest at the summit

Kīlauea volcano is not erupting. Increased earthquake activity and changes in the patterns of ground deformation at Kīlauea’s summit began occurring...

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Volcano Watch — Volcano monitoring from space: InSAR time series success in Alaska

Volcano Watch — Volcano monitoring from space: InSAR time series success in Alaska

In a recent “Volcano Watch” article, we learned about a remote sensing technique known as InSAR. This method of using satellite radar signals to...

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Volcano Watch — Legends of Eruptions Past

Volcano Watch — Legends of Eruptions Past

Active volcanoes tell us their stories through earthquakes, deformation, gas emissions, and lava flows. We interpret those stories through myriad...

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Volcano Watch — Ups and downs at Kīlauea summit: Quiescence, eruptions, and constant change

Volcano Watch — Ups and downs at Kīlauea summit: Quiescence, eruptions, and constant change

May 3rd, 2023, marked the fifth anniversary of the start of Kīlauea’s historic 2018 eruption that resulted in extensive lava flows from the East Rift...

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Volcano Watch — Explosive Eruptions from Halemaʻumaʻu in 1924

Volcano Watch — Explosive Eruptions from Halemaʻumaʻu in 1924

May 2023 marks the 99th anniversary of a sequence of explosive eruptions from Kīlauea's summit that occurred over 16 days from May 11–27, 1924. During...

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Volcano Watch — Five years flow by: reflections on the destructive 2018 eruption of Kīlauea

Volcano Watch — Five years flow by: reflections on the destructive 2018 eruption of Kīlauea

Five years ago, volcanic activity at Kīlauea dramatically changed when magma intruded into the lower East Rift Zone (LERZ). What happened at Kīlauea...

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Volcano Watch — Today’s Family of Five USGS Volcano Observatories Began with HVO Over 111 Years Ago

Volcano Watch — Today’s Family of Five USGS Volcano Observatories Began with HVO Over 111 Years Ago

The Hawaiian Volcano Observatory (HVO) was founded in 1912. Today, over 111 years later, HVO is one of five volcano observatories supported by the U.S...

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Volcano Watch — Did lava flow out of Mauna Loa’s southern caldera in 2022?

Volcano Watch — Did lava flow out of Mauna Loa’s southern caldera in 2022?

The recent 2022 Mauna Loa eruption began just before midnight, at 11:21 p.m. on November 27.  The first caldera floor fissures were visible in webcams...

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