Images

A sonar-equipped personal watercraft mapping the bathymetry underwater near Santa Cruz, Calif.

USGS scientists readying a sonar-equipped boat to map the ocean bottom near Santa Cruz, Calif.

USGS scientist Daniel Hoover mapping the beach at Santa Cruz with a GPS-equipped backpack unit.

 USGS scientists setting up a lidar scanner on the pier to map the beach near Capitola, California.

Mount Crillon in the backdrop during a multibeam bathymetry survey of the Queen Charlotte-Fairweather Fault, offshore southeastern Alaska.

Participants at the September 2016 Argus Workshop at the U.S. Army Corps of Engineers Field Research Facility in Duck, North Carolina, including many of the scientists named in this article (labeled). Rob Holman (Oregon State University) took the photo with a drone.

1-meter-resolution digital image mosaic along the southeast coast of O‘ahu was combined with lidar bathymetry data to create a shaded-relief image.

Seafloor offshore of Point Estero (PE) showing east (EH) and west (WH) strands of the Hosgri fault zone. Arrow points to a seafloor slope (a 12,000 year old shoreline) that has been offset by the east Hosgri strand, indicating a slip rate of about 2.6 millimeters per year.

Large submarine slides off southern California (outlined in small white dots). Low-resolution bathymetry shown in light grey (approximately 100 meters/pixel). High-resolution bathymetry shown in darker grey (less than 20 meters/pixel).

Researchers survey Elwha River elevation and depths. Clockwise from upper left: setting up a traditional survey instrument above the river; measuring river depths from a kayak with sonar and GPS; walking the beach with GPS backpacks; and determining offshore depths using a personal watercraft with GPS and sonar.

Screenshot of Total Water Level and Coastal-Change Forecast Viewer (<https://coastal.er.usgs.gov/hurricanes/research/twlviewer/>) on June 4, 2016, two days before Tropical Storm Colin was expected to hit Florida’s Gulf of America coast.

Video-camera station installed by Jenna Brown and Joe Long atop a hotel in Madeira Beach, Florida.

At the 2016 AGU Fall Meeting, USGS geophysicist Stephanie Ross (right) speaks with Interior Secretary Sally Jewell about ways to help decision makers, emergency responders, and other stakeholders use scientific findings about tsunamis. Photo credit: USGS

USGS research geologist Jon Warrick explains how his team applied structure-from-motion analysis to photos from the California Coastal Records Project to measure coastal change. Jon Warrick explains a “difference map” constructed from structure-in-motion data. Red areas indicate loss of material (erosion); blue areas show addition of material (deposition).

Photograph from pole-mounted camera, looking west across the Skagit River delta and one of several large sediment fans that are moving 1-2 meters per day across the tidal flats. These fans threaten to bury the last intact stands of eelgrass in Skagit Bay, an important rearing habitat for juvenile salmon, crab, and other marine wildlife.

Three-dimensional view of the Hosgri fault 45 meters below the seafloor, revealing fault strands (black), and potential paths along the fault that fluid could follow (green/blue). The other colors represent different geologic layers.

The USGS strives to put coastal change data and information at the fingertips of users such as planners and emergency managers. The explicit goal is to enable users to integrate and apply USGS data and tools to address their specific needs. Online resources such as the Coastal Change Hazards (CCH) portal are designed with applied use of data in mind.

Photographs taken during Tropical Storm Colin (left, June 6, 2016) and one day later (right) on Sunset Beach in the town of St. Pete Beach, Florida. Storm waves eroded the beach and dune, producing a cliff-like feature called a beach scarp. Continuous video collected during a storm could provide more information about the processes causing this coastal change.

A USGS researcher gathers elevation data from an eroding coastal bluff in Arctic Alaska

Sandy beach and cliffs at Moss Landing, California

Large storm waves crashing on the rocks near Santa Cruz, California