Images

Diagram shows the paths that the sound travels away from the sparker source (black oval). The ghost reflections are shown in green and orange. PP= Primary Pulse, BP = Bubble Pulse. From the study Practical approaches to maximizing the resolution of sparker seismic reflection data.

Example imagery revealing the sub-seafloor structure below a submarine landslide in the Santa Barbara Channel, offshore California. The base of the slide is traced in blue, and the near vertical black lines highlight shallow faults cutting through a zone of uplift located below the slide headscarp.   

Animated GIF of fault zone outcrop from late Miocene–Pliocene period, Western Macedonia, Greece. Subsequent images are overlays that are offset with colors inverted, to simulate ghost reflections found in sparker seismic data.

Prior to landfall on the Florida coast on October 9, 2024, the Coastal Change Hazards Team predicted that 86 percent of beaches along the west coast of the Florida peninsula were very likely to erode at the dunes’ base, 82 percent of dunes were very likely to be overwashed by storm waves, and 75 percent of dunes were expected to be very likely to be inundated (

CoastCam on Madeira Beach in Florida on October 8, 2024 before Hurricane Milton made landfall on October 9, 2024.

Coastal Change Hazards Portal showing the trajectory of Hurricane Milton and the various data users could explore on the map.

Coastal Change Hazards Portal showing the trajectory of Hurricane Milton and the various data users could explore on the map.

Coastal Change Hazards Portal showing the trajectory of Hurricane Milton and the various data users could explore on the map.

The Flood Event Viewer showing 12 meter high wave height data recorded by a SOFAR buoy during Hurricane Milton.

The Total Water Level and Coastal Change Forecast Viewer reflecting inundation data on the Gulf coast of Florida during Hurricane Milton.

Coastal Change Hazards Portal showing maximum wave height and storm surge via the COAWST modeling system during Hurricane Milton.

The Flood Event Viewer showing map data layers available during Hurricane Milton.

CoastCam on Madeira Beach in Florida showing coastal conditions during the approach of Hurricane Helene on September 26, 2024.

The Coastal Science Navigator Companion Guide introduces you to USGS coastal change hazards-related products—including interactive data maps, downloadable software, geonarratives, and more. It's organized by timescale, highlighting products relevant to the present, past, and future, although many cover multiple timescales.

Coastal Change Hazards Portal page of the Coastal Science Navigator Companion Guide.

The Coastal Change Likelihood Website page of the Coastal Science Navigator Companion Guide.

The U.S. Coastal Wetlands Synthesis page of the Coastal Science Navigator Companion Guide.

Screenshots from the Coastal Science Navigator Companion Guide overlaid on top of image of the Army Corps of Engineers Field Research Facility pier near Kitty Hawk, North Carolina.

Cover of the Coastal Science Navigator Companion Guide. The guide introduces some of the many coastal change hazards-related products available through the USGS. In it, we showcase the products included in the Coastal Science Navigator’s initial publication in July 2023.

Dr. Donya Frank-Gilchrist of the USGS St. Petersburg Coastal and Marine Science Center presented research on sediment transport in coastal regions at the International Conference on Coastal Engineering on 9/8-9/14/2024, in Rome, Italy. 

The USGS Coastal Change Hazards Portal shows predictions for the coasts of Texas, Louisiana, and Mississippi from Hurricane Francine.