Images

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.

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

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

The U.S. Coastal Wetlands Synthesis Applications geonarrative. The U.S. Geological Survey (USGS) is assessing the physical condition of coastal wetlands and how they may change in response to storms, sea-level rise, and human activity.

Ernest F. Hollings ACE Basin National Wildlife Refuge in South Carolina shown in the pop-out of the U.S. Coastal Wetlands Synthesis Applications geonarrative. 

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

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

Drone used to collect infrared imagery of reefs in the National Park of American Samoa on Ofu.

Scientists conducting Electrical Resistivity Tomography surveys in American Samoa.

Scientists installing thermal camera in the National Park of American Samoa on Ofu.

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

Map of Ofu, American Samoa, showing study sites to investigate outbreaks of Valonia fastigiata algae.

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

Underwater image of Valonia fastigiata algae growing on a reef in 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.

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. 

Aerial image of a reef flat on Ofu, American Samoa, from a thermal drone that captures both regular images and radiometric images.

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

Chart showing relative flood risk per county as a function of sea level rise, from the study Tropical or extratropical cyclones: what drives the compound flood hazard, impact, and risk for the United States Southeast Atlantic coast? 

Graphic showing geographic location of four benchmarking sites used in the study Benchmarking satellite-derived shoreline mapping algorithms.