Volcano Hazards Program Office

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Map of southeastern Idaho showing volcanic rocks related to the Yellowstone hotspot.
November 23, 2020

Volcanic rocks in SE Idaho that are related to the Yellowstone hotspot

Map of southeastern Idaho showing volcanic rocks related to the Yellowstone hotspot. Basalt is shown in red and rhyolite in yellow. Blue circles indicate the location of past Yellowstone calderas; caldera names and approximate ages are shown (Ma = million years old).

Lidar hillshade map of part of the Blackfoot Volcanic Field
November 23, 2020

Lidar hillshade map of part of the Blackfoot Volcanic Field

Lidar hillshade map of part of the Blackfoot Volcanic Field, showing rhyolite domes and fault scarps.

Temperature records from sites on Yellowstone Lake bottom
November 14, 2020

Temperature records from sites on Yellowstone Lake bottom

Year-long (August 2017 to August 2018) temperature records from two hydrothermal vents (“A” and “B”) in the Deep Hole area of Yellowstone Lake.

Color photograph of volcanic crater lake
November 13, 2020

Lake at Kīlauea's summit

Dark brown colors dominated the central and western portions of the lake at Kīlauea's summit. The greenish hues were present in areas that appear to be zone of hot water influx into the lake. USGS photo by M. Patrick.

Color photograph of volcanic crater lake
November 11, 2020

Kīlauea's summit lake between rain showers

A quick visit to the western caldera rim provided brief views of Kīlauea's summit lake between rain showers. The lake colors were particularly vibrant today, with a deep blue-green color in the western end (bottom of photo), with dark brown near the center. USGS photo by M. Patrick.

November 2, 2020

Yellowstone Volcano Observatory Monthly Update for October 2020

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

Yellowstone seismic network
October 31, 2020

Yellowstone seismic network

Map of seismic stations in the Yellowstone region, with numbers of channels indicated by number and sensor type by color.  Inverted triangles indicate stations operated by University of Utah Seismograph Stations (UUSS), and squares indicate stations operated by other agencies.

Color graphic of geologic map
October 22, 2020

Map of Waiʻōhinu area, Island of Hawaiʻi

Map of Waiʻōhinu area, Island of Hawaiʻi, showing the location of the 3,740 year old age.

October 22, 2020

Emerging tech as STEM platforms in problem-based learning (Kīlauea)

USGS–Hawaiian Volcano Observatory Geophysicist Jefferson Chang talks about technologies that track activity at Hawaiian volcanoes and how crowdsourcing and citizen science can contribute to a greater understanding of hazards, in this presentation to the 2020 SACNAS Advancing Hispanics/Chicanos & Native Americans in Science virtual conference held October 19-24, 2020 (

October 20, 2020

The story of Yellowstone's ups and downs

Yellowstone Volcano Observatory Scientist-in-Charge Mike Poland visits Yellowstone National Park to tell the story of how the ground there moves up and down over time. This motion has been measured using a variety of techniques over the past 100 years, and from geological mapping scientists can even tell how the ground has moved going back about 15,000 years! This research

Old Faithful bathhouse during 1914-1933 (top) and 1934-1951 (bottom)
October 17, 2020

Old Faithful bathhouse during 1914-1933 (top) and 1934-1951 (bottom)

Old Faithful bathhouse as it appeared in 1914-1933 (top) and 1934-1951 (bottom).

Yellowstone map with rhyolite eruptions highlighted
October 16, 2020

Yellowstone map with rhyolite eruptions highlighted

Map of Yellowstone National Park adapted from Christiansen and others (2007). The pink regions are rhyolite flows erupted within Yellowstone caldera; these flows contain 5% to 15% crystals by volume. The purple region is the Obsidian Cliff flow, which contains close to 0% crystals.