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Schematic diagram illustrating the difference between a main shock with aftershocks (top), a sequences of foreshocks, main shock, and aftershocks (middle), and a seismic swarm (bottom). Adapted from manuscript by Farrell and others, 2009.
Schematic diagram illustrating the difference between a main shock with aftershocks (top), a sequences of foreshocks, main shock, and aftershocks (middle), and a seismic swarm (bottom). Adapted from manuscript by Farrell and others, 2009.
A map of the lower East Rift Zone of Kīlauea Volcano showing the fissures and flow fields from the 1955 (blue) and 2018 (pink) eruptions. Portions of the 1955 lava flows that were covered during the 2018 eruption, are represented with a blue outline.
A map of the lower East Rift Zone of Kīlauea Volcano showing the fissures and flow fields from the 1955 (blue) and 2018 (pink) eruptions. Portions of the 1955 lava flows that were covered during the 2018 eruption, are represented with a blue outline.
A small rockslide occurred today on the south wall of Halema‘uma‘u, sending boulders into the water at the bottom of the crater. USGS video by M. Patrick.
A small rockslide occurred today on the south wall of Halema‘uma‘u, sending boulders into the water at the bottom of the crater. USGS video by M. Patrick.
A small rockslide occurred today on the south wall of Halema‘uma‘u, sending boulders into the water at the bottom of the crater. USGS video by M. Patrick.
A small rockslide occurred today on the south wall of Halema‘uma‘u, sending boulders into the water at the bottom of the crater. USGS video by M. Patrick.
A view from the south rim of Halema‘uma‘u shows a lower collapsed block which has remains of Crater Rim Drive and the Halema‘uma‘u parking lot. The white feature in the lower right is a stop sign that was present at the eastern exit of the parking lot.
A view from the south rim of Halema‘uma‘u shows a lower collapsed block which has remains of Crater Rim Drive and the Halema‘uma‘u parking lot. The white feature in the lower right is a stop sign that was present at the eastern exit of the parking lot.
Deena Green setting up WinRiver II to make a RioPro measurement at the Selway River near Lowell, ID.
Deena Green setting up WinRiver II to make a RioPro measurement at the Selway River near Lowell, ID.
Getting ready to collect sample number 378 at Green Riv blw Green Riv. Samples collected at regular intervals over a long period of time are critical for understanding current water-quality conditions and changes.
Getting ready to collect sample number 378 at Green Riv blw Green Riv. Samples collected at regular intervals over a long period of time are critical for understanding current water-quality conditions and changes.
HVO technician inspects power/communication station at Pu‘u ‘Ō‘ō on on April 16, 2020. USGS photos by F. Younger.
HVO technician inspects power/communication station at Pu‘u ‘Ō‘ō on on April 16, 2020. USGS photos by F. Younger.
USGS scientists collect field data at Gulkana Glacier in the eastern Alaska Range. The checkerboard sampling pattern in the foreground indicates where snow pit density measurements were collected.
USGS scientists collect field data at Gulkana Glacier in the eastern Alaska Range. The checkerboard sampling pattern in the foreground indicates where snow pit density measurements were collected.
Timing is Everything: How Fish and Wildlife are Responding to Climate Change Through Shifts in the Timing of Life Events
Timing is Everything: How Fish and Wildlife are Responding to Climate Change Through Shifts in the Timing of Life Events
The U.S. has plenty of data on wildfire risk. There are local and regional risk assessments, complex datasets like LANDFIRE and tracking tools like the EROS Fire Danger Monitor, as well as a host of resources and research projects devoted to the subject.
The U.S. has plenty of data on wildfire risk. There are local and regional risk assessments, complex datasets like LANDFIRE and tracking tools like the EROS Fire Danger Monitor, as well as a host of resources and research projects devoted to the subject.
London Bridge was indeed falling down. Set to be torn apart and replaced in the 1960s, this bridge across the River Thames was purchased by businessman Robert McCulloch in April 1968 and shipped across the Atlantic, to Lake Havasu City, Arizona, billed as the world's largest antique.
London Bridge was indeed falling down. Set to be torn apart and replaced in the 1960s, this bridge across the River Thames was purchased by businessman Robert McCulloch in April 1968 and shipped across the Atlantic, to Lake Havasu City, Arizona, billed as the world's largest antique.
Surface tension performs many duties that are vitally important to the environment and people. This video briefly covers Surface tension.
Surface tension performs many duties that are vitally important to the environment and people. This video briefly covers Surface tension.
Marine technician Dan Powers, from the Pacific Coastal and Marine Science Center's Marine Facility (PCMSC MarFac), wears all the required personal protective equipment: bib waders, personal floatation device, and mask.
Marine technician Dan Powers, from the Pacific Coastal and Marine Science Center's Marine Facility (PCMSC MarFac), wears all the required personal protective equipment: bib waders, personal floatation device, and mask.
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.
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.
A USGS field team, to include Pat Bowen, Kate Bowen and John Trainor, uses specialized equipment to measure spring floodwaters at Chesapeake Bay's largest tributary, the Susquehanna River in Maryland.
A USGS field team, to include Pat Bowen, Kate Bowen and John Trainor, uses specialized equipment to measure spring floodwaters at Chesapeake Bay's largest tributary, the Susquehanna River in Maryland.
A USGS field team, to include Pat Bowen, Kate Bowen and John Trainor, uses specialized equipment to measure spring floodwaters at Chesapeake Bay's largest tributary, the Susquehanna River in Maryland.
A USGS field team, to include Pat Bowen, Kate Bowen and John Trainor, uses specialized equipment to measure spring floodwaters at Chesapeake Bay's largest tributary, the Susquehanna River in Maryland.
A USGS field team, to include Pat Bowen, Kate Bowen and John Trainor, uses specialized equipment to measure spring floodwaters at Chesapeake Bay's largest tributary, the Susquehanna River in Maryland.
A USGS field team, to include Pat Bowen, Kate Bowen and John Trainor, uses specialized equipment to measure spring floodwaters at Chesapeake Bay's largest tributary, the Susquehanna River in Maryland.
USGS hydrologist Ken McGrath measures floodwaters off a cableway on Schoharie Creek in North Blenheim, New York.
USGS hydrologist Ken McGrath measures floodwaters off a cableway on Schoharie Creek in North Blenheim, New York.
Grand Prismatic Spring in Midway Geyser Basin Yellowstone National Park on October 19, 2017.
Grand Prismatic Spring in Midway Geyser Basin Yellowstone National Park on October 19, 2017.
