Images

A diagram illustrating how the patterns of erosion and deposition associated with three sediment gravity flows could produce the stacked pockmarks and lateral migration observed in AUV-collected Chirp profiles. Long, uneventful episodes of hemipelagic drape (a, d, g, j) are intermittently interrupted by sediment gravity flows that either: 1b.

Researchers Brian Atwater and Wendy Grant Walter conducting prior paleotsunami research at Salmon River estuary, Oregon.

Sediment core with tidal silt, tsunami sand, and marsh peat collected from the Salmon River estuary, Oregon.

Map showing location of Salmon River estuary, Oregon. Yellow dots represent estuaries, lagoons, and lakes with evidence of the 1700 tsunami.

USGS scientists SeanPaul La Selle and Jason Padgett collecting sediment cores at the Salmon River estuary, Oregon.

Animated GIF of Cascadia 1700 tsunami simulation at Salmon River, Oregon. Colored dots are locations where sediment cores were collected.

Diagram showing the sequence of land subsidence during an earthquake, followed with sand deposited by a tsunami.

Sediment core with tidal silt, tsunami sand, and marsh peat collected from the Salmon River estuary, Oregon.

View of Salmon River estuary, Oregon, from above. Sediment cores were collected from marshland toward the upper left of the image.

Image of an oil drilling platform offshore of Huntington Beach, California, with the sun setting behind it.

On April 19, 2024, in Santa Barbara, California, Susan Zaleski, Donna Schroeder, Dr. Guy Cochrane, and Dr. Mark Page all received FBI Director’s Awards for their participation in the Huntington Beach oil spill case. From left to right, USERT lead Ty Summers, Special Agent Ketrin Adam, Assistant Agent in Charge Sean Haworth, Dr. Guy Cochrane, Donna Schroeder, Dr.

Sidescan sonar data collected along the San Pedro pipeline offshore of southern California.

Animated GIF showing corrected thermal imagery of a groundwater plume discharging onto a reef at Ofu, American Samoa. 

Coral cores collected within the National Park of American Samoa on the island of Ofu.

Scientists conducting Electrical Resistivity Tomography surveys in American Samoa.

Scientists installing a wind and rain gauge in the National Park of American Samoa on Ofu.

USGS and NPS scientists collecting a coral core within the National Park of American Samoa on Ofu.

Scientists viewing data from a thermal camera installed in the National Park of American Samoa on Ofu.

Diagram showing oceanographic and hydrogeologic processes including submarine groundwater discharge on Ofu, American Samoa.

Thermal camera tower method. 1) Original oblique view data 2) Orthorectified nadir view 3) thermal corrections for angular and distance dependence 4) Calibrated thermal image. 

Graph showing corrected thermal camera imagery from the National Park of American Samoa on Ofu.