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Read Coastal and Marine Hazards and Resources Program news from coast to coast!

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253-year coral record reveals Maui reef’s long history of land-use impacts

253-year coral record reveals Maui reef’s long history of land-use impacts

Study traces changes in sediment and nutrient delivery from Maui’s watershed to Olowalu reef, linking a mid-20th-century increase in terrestrial...

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Deep-sea sulfide minerals can spontaneously heat and combust when exposed to air

Deep-sea sulfide minerals can spontaneously heat and combust when exposed to air

Findings from Escanaba Trough, a seafloor spreading center offshore of the Oregon/California border, highlight a potential hazard that could merit...

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A Case Study for Radon as a Tracer of Seabed Minerals

A Case Study for Radon as a Tracer of Seabed Minerals

During the 2026 American Samoa ROV + Mapping Exploration expedition, the team collected water samples from just above the seafloor as well as sediment...

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A previously undocumented process of hydrothermal manganese mineralization

A previously undocumented process of hydrothermal manganese mineralization

A USGS-led study focusing on samples from American Samoa finds that manganese-rich deposits formed beneath the seafloor by warm fluids replacing...

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Mapping Rocky Reef Habitats Along the U.S. West Coast

Mapping Rocky Reef Habitats Along the U.S. West Coast

Updated mapping dataset reveals rocky reefs are widespread but patchier than previously known, providing a more detailed foundation for protecting...

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USGS Awarded NOAA Effects of Sea Level Rise (ESLR) Grant

USGS Awarded NOAA Effects of Sea Level Rise (ESLR) Grant

The U.S. Geological Survey’s St. Petersburg Coastal and Marine Science Center, in collaboration with Florida Gulf Coast University (FGCU), has been...

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High-resolution bathymetry of Lake Chelan, Washington

High-resolution bathymetry of Lake Chelan, Washington

In 2023, the U.S. Geological Survey completed a 3-week field operation in Lake Chelan, Washington, the third deepest lake in the conterminous United...

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USGS Study Analyzes the Skill of Probabilistic Forecasts of Overwash and Inundation Along the Texas and Louisiana Coast

USGS Study Analyzes the Skill of Probabilistic Forecasts of Overwash and Inundation Along the Texas and Louisiana Coast

A new USGS study published in Natural Hazards analyzed the skill of probabilistic forecasts of overwash and inundation along the Louisiana coastline...

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In SF Bay, even an exceptionally wet year can’t supply enough sediment to keep pace with rising seas, new study finds

In SF Bay, even an exceptionally wet year can’t supply enough sediment to keep pace with rising seas, new study finds

Extreme rainfall can send huge amounts of sediment rushing off hillsides and into streams. But a new USGS study finds that even an exceptionally wet...

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Beach nourishment morphodynamics at the Columbia River Mouth

Beach nourishment morphodynamics at the Columbia River Mouth

Beach nourishment projects are often judged by how long newly placed sand remains on the beach. But new research suggests that even when nourishment...

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Decades of satellite imagery show how groins reshape California beaches

Decades of satellite imagery show how groins reshape California beaches

Long-term satellite observations show how human-built coastal structures influence the movement and buildup of sand along three Southern California...

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