NOAA Ship Okeanos Explorer: Mendocino Ridge Mapping Shakedown Cruise, May 5-26, 2009

Data from the multibeam sonar on the NOAA Ship Okeanos Explorer provided a 3D image of an underwater gas plume rising 4,600 feet from the seafloor off the California Coast in 2009. Video courtesy of the NOAA Office of Ocean Exploration and Research. Download largest version (mp4, 23.4 MB).