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Images related to natural hazards.
Yellowstone earthquakes that occurred during 2010-2019. Blue symbols indicate events that occurred as part of swarms, while red indicates non-swarm seismicity. Map courtesy of the University of Utah Seismograph Stations.
Yellowstone earthquakes that occurred during 2010-2019. Blue symbols indicate events that occurred as part of swarms, while red indicates non-swarm seismicity. Map courtesy of the University of Utah Seismograph Stations.
Earthquake hazard map showing peak ground accelerations having a 2 percent probability of being exceeded in 50 years, for a firm rock site. Black box outlines Yellowstone region. The map is based on the most recent USGS models for the conterminous U.S. (2018), Hawaii (1998), and Alaska (2007).
Earthquake hazard map showing peak ground accelerations having a 2 percent probability of being exceeded in 50 years, for a firm rock site. Black box outlines Yellowstone region. The map is based on the most recent USGS models for the conterminous U.S. (2018), Hawaii (1998), and Alaska (2007).
Thurston Lake and Mount Konocti, Clear Lake Volcanic Field, California.
Thurston Lake and Mount Konocti, Clear Lake Volcanic Field, California.
Mount Konocti as seen from the town of Clear Lake.
Mount Konocti as seen from the town of Clear Lake.
Beryl Spring's strongly boiling blue pool is about 8 m (25 ft) wide and contains high-chloride liquid water with a near-neutral pH. Immediately behind the pool is a loud, hissing fumarole producing a white cloud of steam. USGS Photo by Pat Shanks, 2002.
Beryl Spring's strongly boiling blue pool is about 8 m (25 ft) wide and contains high-chloride liquid water with a near-neutral pH. Immediately behind the pool is a loud, hissing fumarole producing a white cloud of steam. USGS Photo by Pat Shanks, 2002.
Imperial Geyser looking south. This hot spring pool is about 30 m (about 100 ft) across and contains alkaline-Cl waters with a steam vent in the pool and mudpots outside the pool area (in the upper right part of this photo). USGS Photo by Pat Shanks, 2019.
Imperial Geyser looking south. This hot spring pool is about 30 m (about 100 ft) across and contains alkaline-Cl waters with a steam vent in the pool and mudpots outside the pool area (in the upper right part of this photo). USGS Photo by Pat Shanks, 2019.
Jack. R. Friedman is a social scientist with the Reducing Risk project of the USGS Natural Hazards Mission Area.
Jack. R. Friedman is a social scientist with the Reducing Risk project of the USGS Natural Hazards Mission Area.
2020 Volcano Awareness Month Schedule Overview. Details are posted on the USGS-Hawaiian Volcano Observatory's website at https://volcanoes.usgs.gov/observatories/hvo/.
2020 Volcano Awareness Month Schedule Overview. Details are posted on the USGS-Hawaiian Volcano Observatory's website at https://volcanoes.usgs.gov/observatories/hvo/.
Still image from January 2, 2020, YVO video update.
Still image from January 2, 2020, YVO video update.
Map of seismicity (yellow circles) in the Yellowstone region during 2019. Gray lines are roads, red line shows the caldera boundary, Yellowstone National Park is outlined by black dashed line, and gray dashed lines denote state boundaries.
Map of seismicity (yellow circles) in the Yellowstone region during 2019. Gray lines are roads, red line shows the caldera boundary, Yellowstone National Park is outlined by black dashed line, and gray dashed lines denote state boundaries.
The December 18 overflight provided updated thermal images of Kīlauea summit, covering the caldera floor and showing the warm surface of the water pond in Halema‘uma‘u crater. A band of warm temperatures persists along the new cliff formed during the 2018 subsidence.
The December 18 overflight provided updated thermal images of Kīlauea summit, covering the caldera floor and showing the warm surface of the water pond in Halema‘uma‘u crater. A band of warm temperatures persists along the new cliff formed during the 2018 subsidence.
The December 18 overflight provided updated aerial photographs of Kīlauea summit, covering the caldera floor and showing the current size of the water pond in Halema‘uma‘u crater. The label "downdropped block" shows the large portion of the caldera floor that subsided, along with the Halema‘uma‘u region, during the 2018 eruption.
The December 18 overflight provided updated aerial photographs of Kīlauea summit, covering the caldera floor and showing the current size of the water pond in Halema‘uma‘u crater. The label "downdropped block" shows the large portion of the caldera floor that subsided, along with the Halema‘uma‘u region, during the 2018 eruption.
An HVO geologist uses a high-precision Global Positioning System (GPS) unit to collect latitude, longitude, and altitude data on a down-dropped portion of Kīlauea's caldera.
An HVO geologist uses a high-precision Global Positioning System (GPS) unit to collect latitude, longitude, and altitude data on a down-dropped portion of Kīlauea's caldera.
USGS scientists collaborate with Sri Lankan scientists from the National Building Research Organization (NBRO) on the installation of rainfall and soil moisture instrumentation on an active landslide in southwest Sri Lanka. The station provides real-time data including rainfall and soil moisture content of an active landslide.
USGS scientists collaborate with Sri Lankan scientists from the National Building Research Organization (NBRO) on the installation of rainfall and soil moisture instrumentation on an active landslide in southwest Sri Lanka. The station provides real-time data including rainfall and soil moisture content of an active landslide.
After collecting a sample from the well using the narrow sampler shown, HVO staff transfer the water sample into a container. The water is collected periodically for chemical analyses so that changes in the water composition can be tracked. For more information about the Keller Well, please see HVO's Dec.
After collecting a sample from the well using the narrow sampler shown, HVO staff transfer the water sample into a container. The water is collected periodically for chemical analyses so that changes in the water composition can be tracked. For more information about the Keller Well, please see HVO's Dec.
The communications hub at Pu‘u ‘Ō‘ō is precariously perched on the north rim, which is actively collapsing. This hub, and the PN cam behind the hub (to the left of image) will ultimately fall into the crater as the north rim continues to collapse.
The communications hub at Pu‘u ‘Ō‘ō is precariously perched on the north rim, which is actively collapsing. This hub, and the PN cam behind the hub (to the left of image) will ultimately fall into the crater as the north rim continues to collapse.
Joseph Terrano of the USGS St. Petersburg Coastal and Marine Science Center prepares water level loggers to install near the marsh shoreline in Grand Bay National Estuarine Research Reserve, Mississippi.
Joseph Terrano of the USGS St. Petersburg Coastal and Marine Science Center prepares water level loggers to install near the marsh shoreline in Grand Bay National Estuarine Research Reserve, Mississippi.
On Tuesday, December 10 HVO staff visited Keller Well, a deep borehole at the summit of Kīlauea, to take quarterly measurements and samples. This photo shows an extra long measuring tape, which has a sensor attached to the end, being lowered into the well to measure the distance to the top of the water table.
On Tuesday, December 10 HVO staff visited Keller Well, a deep borehole at the summit of Kīlauea, to take quarterly measurements and samples. This photo shows an extra long measuring tape, which has a sensor attached to the end, being lowered into the well to measure the distance to the top of the water table.
Established in 2009, the U.S. Geological Survey’s Coral Assessment Network (USGS-CAN) provides data on coral-growth (calcification) rates throughout the Florida Keys. Pictured here is a coral at Crocker Reef in the upper Florida Keys.
Established in 2009, the U.S. Geological Survey’s Coral Assessment Network (USGS-CAN) provides data on coral-growth (calcification) rates throughout the Florida Keys. Pictured here is a coral at Crocker Reef in the upper Florida Keys.
Angel Terrace, Mammoth Hot Springs, Yellowstone National Park. Travertine deposits are abundant in the area. Photo by JoAnn Holloway, 2003.
Angel Terrace, Mammoth Hot Springs, Yellowstone National Park. Travertine deposits are abundant in the area. Photo by JoAnn Holloway, 2003.
Water collected from the lake at the bottom of Halema‘uma‘u is prepared for laboratory analyses at the USGS California Volcano Observatory. Results thus far reveal chemistry indicative of complex reactions among the water, magmatic gases and Kīlauea's basaltic rocks.
Water collected from the lake at the bottom of Halema‘uma‘u is prepared for laboratory analyses at the USGS California Volcano Observatory. Results thus far reveal chemistry indicative of complex reactions among the water, magmatic gases and Kīlauea's basaltic rocks.