A winding strip of rainbow colors shows the bathymetry (depth) of the bed of the Mokelumne River just above its confluence with the San Joaquin in the Sacramento-San Joaquin River Delta east of San Francisco Bay. USGS scientists mapped the channel as part of a project to assess the impact of invasive aquatic vegetation on sediment movement in the Delta. Orange colors are shallowest areas; blue colors are deepest. Note sand waves (rippled texture) produced by strong currents in the deep stretch left of center. Aerial photo, USGS National Map.
After a successful beach survey and installation of remote-sensing cameras on a nearby island, scientists Shawn Harrison and Andrew Stevens spotted this bald eagle near the mouth of the Skagit River, Washington.
Computer image of bedrock grooves (corrugations) derived from 3D seismic imaging offshore of Costa Rica. It shows the megathrust fault surface of the Cocos Plate diving beneath the Caribbean Plate, with the upper plate virtually removed. Some of the fault surface has long, straight corrugations; some appears more jumbled. Researchers stretched the image slightly to make the grooves easier to see. The view is roughly from Costa Rica looking offshore. Source: USGS and UC Santa Cruz.
Footage courtesy of Schmidt Ocean Institute, ROV ROPOS
Video annotation and editing by Amy West [Transcript]
Curt Storlazzi of the USGS explains how the water cycle pulled him into oceanography, and how his personal interests parallel his profession. [Transcript]
Length: 1:00 min
Drone footage collected by Shawn Harrison.
USGS drone footage shows the slide from many angles. It points out buried and unburied parts of Highway 1, as well as new roads built across the slide for monitoring purposes.
Left to right: In July 2017 Tim Elfers (USGS), Hannah Drummond (WA State Dept. of Ecology), Heather Weiner (WA State Dept. of Ecology), Andrew Stevens (USGS), and Andy Ritchie (USGS) used handheld computers and backpack-mounted GPS equipment to record topography along a beach near the mouth of the Elwha River. Learn more, and watch our fieldwork slideshow!
Two video cameras atop the Dream Inn hotel in Santa Cruz, California, overlook the coast in northern Monterey Bay. Camera 1 looks eastward over Santa Cruz Main Beach and boardwalk, while camera 2 looks southward over Cowells Beach. Every half hour, both cameras shoot video for 10 minutes. Check out the latest images!
Filmed and produced by Amy West — See the Transcript
An atmospheric river, or narrow band of moisture moving from the tropics to the higher latitudes, hit California in early January and brought the first heavy rains of 2017. While these storms help a drought-stricken state, the onslaught of rain triggers floods and mudslides, and fills rising rivers with sediment and debris. Here the San Lorenzo River flows full and muddy past the Santa Cruz Beach Boardwalk. Photo by Andrew Stevens, USGS
On the remote western coast of Australia lies a UNESCO World Heritage Site above and below the sea. Researchers from the U.S. Geological Survey and University of Western Australia convened here at Ningaloo Reef and Jurabi Coastal Reserve to embark on the most extensive study EVER done into how coral reefs shape our coasts. [Transcript]
During a massive northwesterly storm in September 2016, a USGS team documenting coastal change on Barter Island, Alaska, watched car-sized chunks of permafrost bluffs fall into the ocean. Aside from flooding the runway and delaying their departure, the storm—with winds up to 50 mph pushing 6 to 10 foot seas—also eroded some of the offshore sandy barrier islands where 50 to 60 polar bears spend their late summers. The storm cut a small channel through one island—essentially splitting it into two—leaving just a strip of submerged land for the bears to walk across. A USGS time-lapse camera captured some bears at one of the USGS study sites on Barter Island—a gully the bears use to move from the beach to the bluff top.
Learn more about how the USGS is studying climate change in the Arctic.
Cerulean damselfish dart around lettuce coral off the Cape Range National Park along the Ningaloo Coast in Western Australia. USGS researchers combined forces with Australian colleagues in this UNESCO World Heritage Site to conduct the most extensive study of how erosion of reefs contribute sand to the beaches—a coast’s natural armor. With the threat of a rising sea and changes to the climate, understanding this connection can tell us how resilient the coast will be. Photo by Curt Storlazzi, USGS
Scientists from USGS offices in Santa Cruz, California, and St. Petersburg, Florida, sampled seawater off the coral reefs of west Maui in March 2016. Several times a day, they measured conditions such as acidity and nutrient levels to determine whether freshwater from land is seeping from the ocean floor and potentially harming corals. Left to right: Kim Yates and Nate Smiley of the St. Petersburg office. Photo by Nancy Prouty of the Santa Cruz office. [Larger version]
Curt Storlazzi places an ocean monitoring system 65 feet down in Oʻahu’s Maunalua Bay during a summer of coral spawning. The device measures a myriad of properties: waves, currents, temperature, salinity, turbidity, all of which help USGS scientists understand what controls coral reef health. Photo by Tom Reiss, USGS. [Larger version]
After capturing imagery of the ocean bottom in Monterey Bay in 2014, USGS engineering technician Tim Elfer’s watercraft broke down on the way back to the Santa Cruz Harbor. Sitting still in a dry suit on a hot, 80° day, motivated Tim to plunge into cool water while waiting for a tow. Photo by Andrew Stevens, USGS. [Larger version]
On remote Barter Island, Alaska, Bruce Richmond (right) and Cordell Johnson drill into 500-foot-thick permafrost using a handheld drill with a 2-inch drill bit—a challenging task! It can take 3 hours to drill nearly 20 feet down. They collect samples of the frozen ground to better understand how climate change is affecting permafrost thaw on Alaska’s Arctic coast. Photo by Peter Swarzenski, USGS. [Larger version]