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HW2_250M_LCC_WGS84.TIF - Hawaii II - Central Hawaiian Ridge U.S. EEZ GLORIA sidescan-sonar composite mosaic (LCC, 250 m, WGS84)

Published by U.S. Geological Survey | Department of the Interior | Metadata Last Checked: January 27, 2026 | Last Modified: 2021-11-11T00:00:00Z
In 1984, the U.S. Geological Survey (USGS), Office of Marine Geology, launched a program using the Geological LOng-Range Inclined Asdic (GLORIA) sidescan-sonar system to study the entire U.S. Exclusive Economic Zone (EEZ). From 1988 through 1991, as part of that program, the USGS and IOS (Institute of Oceanographic Sciences, U.K.) scientists conducted nine cruises within the U.S. EEZ off Hawaii. The surveys during that time period focused on the central Hawaiian region. The results of these surveys were 24 digital mosaics of approximately a 2 degree by 2 degree area with a 50-meter pixel resolution. As in earlier EEZ reconnaissance surveys, the USGS utilized the GLORIA (Geological LOng-Range Inclined Asdic) sidescan-sonar system to complete the geologic mapping. The collected GLORIA data were processed and digitally mosaicked to produce continuous imagery of the sea-floor.

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ACOUSTIC RECEIVERS Brooks Bank CMGP Coastal and Marine Geology Program EEZ East Pacific Rise Exclusive Economic Zone Exclusive Economic Zone (EEZ) French Frigate Shoals GLORIA GLORIA > Geological Long-Range Inclined ASDIC Gardner Pinnacles GeoTIFF image Geological LOng-Range Inclined Asdic Hawaii Hawaii Ecoregion Hawaiian Arch Hawaiian Islands Hawaiian Ridge Hawaiian Trough Hawaiian-Emperor Chain Horizon Guyot Infobank identifier F-1-90-HW Infobank identifier F-1-91-CP Infobank identifier F-10-88-HW Infobank identifier F-10-91-HW Infobank identifier F-12-89-HW Infobank identifier F-13-89-HW Infobank identifier F-2-90-HW Infobank identifier F-5-91-CP Infobank identifier F-6-91-CP Kauai Fracture Zone Kure Island Marine Basin Floor Marine Oceanic Midway Island Molokai Fracture Zone Murray Fracture Zone Necker Ridge Nihoa Ridge Ocean > Pacific Ocean Ocean > Pacific Ocean > Central Pacific Ocean Ocean > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands Oceans > Ocean Acoustics > Acoustic Reflectivity SIDE-SCAN SONAR St. Rogatien Bank U.S. Geological Survey USGS USGS:54099483-f72e-4ee0-909b-b4bf2ec00586 WCMG Western Coastal and Marine Geology Western Pacific Ocean acoustic reflectivity backscatter distributions geoscientificInformation grey scale image image mosaics imageryBaseMapsEarthCover marine geology marine geophysics oceans physical habitats and geomorphology sea-floor acoustic reflectivity sea-floor characteristics seabed sidescan sonar sidescan-sonar mosaic

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