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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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Photo and Video Chronology – HVO upgrades Hualālai Repeater and installs new webcam – April 19, 2023

Photo and Video Chronology – HVO upgrades Hualālai Repeater and installs new webcam – April 19, 2023

During the week of April 10, the Hawaiian Volcano Observatory upgraded the Hualālai Repeater station and installed a new webcam looking at the...

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Photo and Video Chronology – Kīlauea Seismic Imaging Project Begins – April 18, 2023

Photo and Video Chronology – Kīlauea Seismic Imaging Project Begins – April 18, 2023

Fieldwork for the Kīlauea Seismic Imaging Project, which will provide a new detailed view of shallow subsurface structures and the magma system...

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The oldest igneous rocks in Yellowstone

The oldest igneous rocks in Yellowstone

Much of the geological attention at Yellowstone National Park is on the young volcanic rocks. But the geologic history of the region and the ages of...

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Volcano Watch — Imaging the underground at Kīlauea’s summit

Volcano Watch — Imaging the underground at Kīlauea’s summit

Where is magma stored beneath the surface of Kīlauea and how is it transported to the places where eruptions occur? Scientists have hypothesized the...

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Thermal Infrared Remote Sensing at Yellowstone 201: Processing the images

Thermal Infrared Remote Sensing at Yellowstone 201: Processing the images

Thermal infrared images not only make nice pictures, they also give us quantitative information about thermal energy being radiated from Earth’s...

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Volcano Watch — April is Tsunami Awareness Month in Hawaii

Volcano Watch — April is Tsunami Awareness Month in Hawaii

It’s official! Governor Green recently proclaimed that April is again Tsunami Awareness Month for the State of Hawaii. This is not to be confused with...

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Pink snow: Algae blooms high in the mountains of Yellowstone (and around the world)

Pink snow: Algae blooms high in the mountains of Yellowstone (and around the world)

When one thinks of life in extreme environments, Yellowstone hot springs may be one of the first places to come to mind. Another extreme?  The...

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A better understanding of Yellowstone hot springs and hydrothermal systems thanks to the outstanding achievements of Robert O. Fournier

A better understanding of Yellowstone hot springs and hydrothermal systems thanks to the outstanding achievements of Robert O. Fournier

Robert Fournier, who passed away in January 2023, was a pioneer in studying the hydrothermal system of Yellowstone National Park, laying the...

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Ashton to Island Park: 2.1 million years of volcanic history in 30 minutes

Ashton to Island Park: 2.1 million years of volcanic history in 30 minutes

A 30-minute drive along U.S. Route 20 in Idaho between Ashton and Island Park will take you through the history of the first two caldera systems that...

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Volcano Watch — GeoSPACE: The benefits of accommodation and inclusion in geology field experiences

Volcano Watch — GeoSPACE: The benefits of accommodation and inclusion in geology field experiences

Scientists from the USGS Hawaiian Volcano Observatory (HVO) are collaborating with academic colleagues to make field experiences in geology more...

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Tracing the sources of ancient volcanoclastic rocks in Yellowstone using crystals

Tracing the sources of ancient volcanoclastic rocks in Yellowstone using crystals

Geologists are very much like detectives—they use a variety of investigative tools to understand how a landscape develops. Geochemistry is one such...

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