Volcano Hazards Program Office

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July 16, 2020

No significant changes at Kīlauea's summit water lake

An HVO geologist collects GPS data on the western rim of Kīlauea's summit caldera. The geologist is standing upon a thick sequence of tephra deposits formed during explosive eruptions at Kīlauea's summit between about 1500 CE and the early 19th century. These layers of explosive deposits cap a much thicker sequence of lava flows (bottom and left portion of the photo),

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Panorama of Hayden Valley, Yellowstone National Park
July 15, 2020

Panorama of Hayden Valley, Yellowstone National Park

Panoramic photo of Hayden Valley looking east toward the Yellowstone River from the Mary Mountain trail.

Violet Creek in Hayden Valley, Yellowstone National Park
July 15, 2020

Violet Creek in Hayden Valley, Yellowstone National Park

A small stream, Violet Creek, winds its way through Hayden Valley in Yellowstone National Park.

150 year Comparison of Giant and Castle Geysers, Yellowstone
July 15, 2020

150 year Comparison of Giant and Castle Geysers, Yellowstone

Comparison of photos from Giant and Castle Geysers separated by almost 150 years. These images suggest almost no changes to the geyser structure implying that large geysers form over thousands of years. 

Photo credits: Top left: U.S. Geological Survey Denver Library Photographic Collection, Jackson, W.H. Collection. Top right: NPS public domain.  Lower left: U.S.

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July 10, 2020

Repeating quakes during multiple phases of unrest and eruption

The video describes work by Jay Wellik, a USGS seismologist and his colleagues with the Volcano Disaster Assistance Program (VDAP). They assisted Indonesia's CVGHM in responding to the 2017 activity/eruption at Mt. Agung, on the island of Bali. The work describes use of software to characterize the different types of earthquakes at the volcano, and how that revealed

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July 9, 2020

Another view of the Fissure 8 channel, looking upstream. On the right, a lower

Another view of the Fissure 8 channel, looking upstream. On the right, a lower ledge along the channel wall represents the level of lava in the channel during the later stages of the flow. USGS photo by M. Patrick.

Color photograph of technician standing outside next to solar panel
July 2, 2020

Hawaiian Volcano Observatory (HVO) electronics technician Steven Fuke

Hawaiian Volcano Observatory (HVO) electronics technician Steven Fuke stands near a solar panel system that powers a volcano-monitoring station. 

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July 2, 2020

A Legendary part of the Wailuku River is again revealed

View of the recently cleared Boiling Pots on the Wailuku River in Hilo. The pots, each about 15 m (50 ft) in diameter, are eroded into a 10,000 year old Mauna Loa lava flow. When the water is low, the river does not flow over some of the pot rims but it continues to flow through them. USGS photo.

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July 2, 2020

Views of the 2018 lower East Rift Zone lava flow field along Highway 132

HVO geologists visited the lower East Rift Zone lava flow field this past week to make measurements and observations, to better understand and reconstruct the dynamics of the Fissure 8 lava flow. This photo shows the channel wall in the braided channel region of the flow. The channel wall here is about 6 m (20 feet) high, and the channel just upstream of this position is

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July 1, 2020

Yellowstone Volcano Observatory Monthly Update: July 1, 2020

Mike Poland, Scientist-in-Charge of the Yellowstone Volcano Observatory, gives an overview of activity at Yellowstone during June 2020.
 

Geologists from Montana State University study an outcrop of diorite.
June 25, 2020

Geologists from Montana State University study an outcrop of diorite

Geologists from Montana State University study an outcrop of diorite (a silicic igneous rock that cooled slowly beneath the ground). An outcrop of this size is important because it is easier to see any structural relations along with rock composition.

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June 25, 2020

In the eastern portion of the lake, the dark brown zone had a slightly mottled a

In the eastern portion of the lake, the dark brown zone had a slightly mottled appearance, but this pattern was transient and gone within about ten minutes.