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Unlike typical tsunamigenic earthquakes that occur on the thrust fault that separates tectonic plates in a subduction zone (termed the interplate...

The California Seafloor Mapping Program is a State and Federally funded program to create a series of geologic and seafloor-habitat basemaps for all...

The Samoa tsunami of September 29, 2009, was the fifth tsunami studied by U.S. Geological Survey (USGS) field teams in 15 years, and yet it presented...

Mapping offshore faults near Santa Catalina Island in July of 2009.

The rate of coastal erosion more than doubled in Alaska—to as much as 45 feet per year—within the 52-year period between 1955 and 2007 along a 37-mile...

A USGS team is assessing changes along the North Slope coastline using historical and contemporary maps and aerial surveys.

Amy wins award for “Excellence in Sedimentary Geology by a Young Scientist.”

Coral reefs are in decline worldwide, and a leading cause of their decline is the runoff of sediment and pollutants from nearby land surfaces.

A decades-old plastic USGS current drifter was recently found by a 5-year-old boy on the shore of San Pablo Bay, California, triggering a flurry of e...