A lahar is a volcanic mudflow. Learn if you are if you are in a lahar hazard zone and how to evacuate to high ground. If you are in a lahar hazard zone and get a lahar alert - go now! Every second matters.
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Lahar Safety Infographic
A lahar is a volcanic mudflow. Learn if you are if you are in a lahar hazard zone and how to evacuate to high ground. If you are in a lahar hazard zone and get a lahar alert - go now! Every second matters.
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A well-traveled data logger used over the course of the USMTArray. Custom MT instruments purchased at the start of the USMTArray supported the 18 year effort.
A well-traveled data logger used over the course of the USMTArray. Custom MT instruments purchased at the start of the USMTArray supported the 18 year effort.
U.S. Drought Monitor Drought Conditions Map, National Weather Service Colorado River Basin Forecast Center, April 7, 2026
U.S. Drought Monitor Drought Conditions Map, National Weather Service Colorado River Basin Forecast Center, April 7, 2026Image for the USGS Colorado River Basin Actionable and Strategic Integrated Science and Technology (ASIST) Initiative, geonarrative about the intersection of water use for copper mining and historic drought in the Lower Colorado River Basin (primarily Arizona), April 7, 2026.
U.S. Drought Monitor Drought Conditions Map, National Weather Service Colorado River Basin Forecast Center, April 7, 2026
U.S. Drought Monitor Drought Conditions Map, National Weather Service Colorado River Basin Forecast Center, April 7, 2026Image for the USGS Colorado River Basin Actionable and Strategic Integrated Science and Technology (ASIST) Initiative, geonarrative about the intersection of water use for copper mining and historic drought in the Lower Colorado River Basin (primarily Arizona), April 7, 2026.
12-12-25 Hubbard Glacier Collapsed Snow Bridges
Collapsed snow bridges on crevasse field on the Hubbard Glacier between McArthur Peak and Mt. King George. Photo courtesy of Yukon Geological Survey.
Collapsed snow bridges on crevasse field on the Hubbard Glacier between McArthur Peak and Mt. King George. Photo courtesy of Yukon Geological Survey.
12-12-25 Mt. Vancouver and Mt. Logan Arete Landslides
12-12-25 Mt. Vancouver and Mt. Logan Arete LandslidesCollapsed snow bridges on crevasse field on the Hubbard Glacier between McArthur Peak and Mt. King George. Photo courtesy of Yukon Geological Survey.
12-12-25 Mt. Vancouver and Mt. Logan Arete Landslides
12-12-25 Mt. Vancouver and Mt. Logan Arete LandslidesCollapsed snow bridges on crevasse field on the Hubbard Glacier between McArthur Peak and Mt. King George. Photo courtesy of Yukon Geological Survey.
12-12-25 Mt. King George East Face Landslide
Recent landslide on the east face of Mt. King George (3741 m) with clouds of dust from ongoing rockfall. Debris descended over 1500 m to the glacier below. Photo courtesy of Yukon Geological Survey.
Recent landslide on the east face of Mt. King George (3741 m) with clouds of dust from ongoing rockfall. Debris descended over 1500 m to the glacier below. Photo courtesy of Yukon Geological Survey.
Videos
The New Norris Hot Spring (Yellowstone Monthly Update - March 2026)
The New Norris Hot Spring (Yellowstone Monthly Update - March 2026)KABOOM! That’s what Yellowstone is famous for – huge explosive volcanic eruptions. There’s really nothing brewing right now, the magma chamber is mostly solid, but there have been quite a few hydrothermal eruptions and small explosions in both Biscuit Basin and Norris Geyser Basin as water in the hydrothermal system flashes to steam.
The New Norris Hot Spring (Yellowstone Monthly Update - March 2026)
The New Norris Hot Spring (Yellowstone Monthly Update - March 2026)KABOOM! That’s what Yellowstone is famous for – huge explosive volcanic eruptions. There’s really nothing brewing right now, the magma chamber is mostly solid, but there have been quite a few hydrothermal eruptions and small explosions in both Biscuit Basin and Norris Geyser Basin as water in the hydrothermal system flashes to steam.
Ozette Lake Paleoseismology
Ozette Lake is located above the locked portion of the northern Cascadia megathrust and is relatively isolated from other active faults.
Ozette Lake is located above the locked portion of the northern Cascadia megathrust and is relatively isolated from other active faults.
Ozette Lake Paleoseismology (AD)
Ozette Lake is located above the locked portion of the northern Cascadia megathrust and is relatively isolated from other active faults.
Ozette Lake is located above the locked portion of the northern Cascadia megathrust and is relatively isolated from other active faults.
Measuring Moving Mountains (Yellowstone monthly update - February 2026)
Measuring Moving Mountains (Yellowstone monthly update - February 2026)Meet a friend of ours. This friend has been monitoring changes of the ground surface in Yellowstone for decades and is so good that it can detect movement of just a few millimeters in magnitude (just a fraction of an inch). The friend? A continuous GPS station!
Measuring Moving Mountains (Yellowstone monthly update - February 2026)
Measuring Moving Mountains (Yellowstone monthly update - February 2026)Meet a friend of ours. This friend has been monitoring changes of the ground surface in Yellowstone for decades and is so good that it can detect movement of just a few millimeters in magnitude (just a fraction of an inch). The friend? A continuous GPS station!
Multi-site evaluation of a postfire debris-flow runout forecast method
Multi-site evaluation of a postfire debris-flow runout forecast methodPostfire debris flows pose a hazard to human life, property, and infrastructure when they travel from steep source areas to urbanized alluvial fans or other developed areas.
Multi-site evaluation of a postfire debris-flow runout forecast method
Multi-site evaluation of a postfire debris-flow runout forecast methodPostfire debris flows pose a hazard to human life, property, and infrastructure when they travel from steep source areas to urbanized alluvial fans or other developed areas.
Hawaii versus Yellowstone (Yellowstone monthly update - December 2025)
Hawaii versus Yellowstone (Yellowstone monthly update - December 2025)Just last week, Kīlauea put on another dramatic display of lava fountaining and flows within the caldera, during its 37th episode of this most recent eruption. It doesn't seem like Hawaii and Yellowstone have a lot in common, but actually, those two magmatic systems have a common cause.
Hawaii versus Yellowstone (Yellowstone monthly update - December 2025)
Hawaii versus Yellowstone (Yellowstone monthly update - December 2025)Just last week, Kīlauea put on another dramatic display of lava fountaining and flows within the caldera, during its 37th episode of this most recent eruption. It doesn't seem like Hawaii and Yellowstone have a lot in common, but actually, those two magmatic systems have a common cause.
Audio
Landers Rupture — Sue on what it felt like
USGS seismologist Susan Hough recalls what the 1992 Landers earthquake felt like from Pasadena, CA.
USGS seismologist Susan Hough recalls what the 1992 Landers earthquake felt like from Pasadena, CA.
Landers Rupture — Sue on her role after the earthquake and seismic monitoring in Southern CA
Landers Rupture — Sue on her role after the earthquake and seismic monitoring in Southern CAUSGS seismologist Susan Hough talks about her role following the 1992 Landers earthquake and seismic monitoring stations in Southern California.
Landers Rupture — Sue on her role after the earthquake and seismic monitoring in Southern CA
Landers Rupture — Sue on her role after the earthquake and seismic monitoring in Southern CAUSGS seismologist Susan Hough talks about her role following the 1992 Landers earthquake and seismic monitoring stations in Southern California.
Landers Rupture — Scott on what it looked like
USGS field technician Scott Lydeen recalls what the aftermath of the 1992 Landers earthquake looked like.
USGS field technician Scott Lydeen recalls what the aftermath of the 1992 Landers earthquake looked like.
Landers Rupture — Sue on how monitoring networks evolved
Landers Rupture — Sue on how monitoring networks evolvedUSGS seismologist Susan Hough described the Southern California Seismic Network and how it was used for the 1992 Landers earthquake.
Landers Rupture — Sue on how monitoring networks evolved
Landers Rupture — Sue on how monitoring networks evolvedUSGS seismologist Susan Hough described the Southern California Seismic Network and how it was used for the 1992 Landers earthquake.
Landers Rupture — Where they were
USGS scientists remember where they were during the 1992 Landers earthquake in Southern California
USGS scientists remember where they were during the 1992 Landers earthquake in Southern California
Landers Rupture — Andy on using satellite data
USGS seismologist Andrew Michael talks about the remote location of the 1992 Landers earthquake and how researchers were able to use satellite data to better see the quake’s impacts.
USGS seismologist Andrew Michael talks about the remote location of the 1992 Landers earthquake and how researchers were able to use satellite data to better see the quake’s impacts.
Webcams
Madeira Beach
A coastal camera located on Medeira Beach, Florida near the Shoreline Island Resort.
A coastal camera located on Medeira Beach, Florida near the Shoreline Island Resort.
Johnston Ridge Observatory, Mount St. Helens
This static image is from a USGS Cascades Volcano Observatory research camera located at the Johnston Ridge Observatory, north of Mount St. Helens. The view is to the south. This camera is intended to assist the USGS with situational awareness. At times, clouds, rain, and snow obscure visibility.
This static image is from a USGS Cascades Volcano Observatory research camera located at the Johnston Ridge Observatory, north of Mount St. Helens. The view is to the south. This camera is intended to assist the USGS with situational awareness. At times, clouds, rain, and snow obscure visibility.
Most recent snapshot at Madeira Beach, Florida, Camera 2
Most recent snapshot at Madeira Beach, Florida, Camera 2Most recent snapshot from Camera 2 at Madeira Beach, Florida. Camera hosted by Shoreline Island Resort.
Most recent snapshot at Madeira Beach, Florida, Camera 2
Most recent snapshot at Madeira Beach, Florida, Camera 2Most recent snapshot from Camera 2 at Madeira Beach, Florida. Camera hosted by Shoreline Island Resort.
Nuvuk video camera 2 dark image
Two video cameras are installed atop a utility pole near the northernmost point of land in the United States at Nuvuk (Point Barrow), Alaska. The cameras point northwest toward the Arctic Ocean and the boundary between the Chukchi and Beaufort Seas. Every half hour during daylight hours, the cameras collect snapshots and video for 10 minutes.
Two video cameras are installed atop a utility pole near the northernmost point of land in the United States at Nuvuk (Point Barrow), Alaska. The cameras point northwest toward the Arctic Ocean and the boundary between the Chukchi and Beaufort Seas. Every half hour during daylight hours, the cameras collect snapshots and video for 10 minutes.
Nuvuk video camera 2 bright image
Two video cameras are installed atop a utility pole near the northernmost point of land in the United States at Nuvuk (Point Barrow), Alaska. The cameras point northwest toward the Arctic Ocean and the boundary between the Chukchi and Beaufort Seas. Every half hour during daylight hours, the cameras collect snapshots and video for 10 minutes.
Two video cameras are installed atop a utility pole near the northernmost point of land in the United States at Nuvuk (Point Barrow), Alaska. The cameras point northwest toward the Arctic Ocean and the boundary between the Chukchi and Beaufort Seas. Every half hour during daylight hours, the cameras collect snapshots and video for 10 minutes.
Nuvuk video camera 1 dark image
Two video cameras are installed atop a utility pole near the northernmost point of land in the United States at Nuvuk (Point Barrow), Alaska. The cameras point northwest toward the Arctic Ocean and the boundary between the Chukchi and Beaufort Seas. Every half hour during daylight hours, the cameras collect snapshots and video for 10 minutes.
Two video cameras are installed atop a utility pole near the northernmost point of land in the United States at Nuvuk (Point Barrow), Alaska. The cameras point northwest toward the Arctic Ocean and the boundary between the Chukchi and Beaufort Seas. Every half hour during daylight hours, the cameras collect snapshots and video for 10 minutes.