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USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Our programs produce accurate geologic maps and 3-D geologic frameworks that provide critical data for sustaining and improving the quality of life and economic vitality of the Nation. They also organize, maintain, and publish the geospatial baseline of the Nation's topography, natural landscape, built environment and more.
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Field observations and logs from the Rose Hip trench exposure across a north-facing scarp within the Seattle Fault Zone, southern Bainbridge Island, Washington
The Seattle Fault Zone is an approximately 70-km-long, east-west-trending zone of south-dipping blind reverse faults within the Puget lowland region in Washington. Because of the proximity, the Seattle Fault Zone poses a significant earthquake hazard to the Puget sound and Seattle metropolitan regions. We present preliminary mapping and trench-site information from a paleoseismic...
Colored shaded relief bathymetry and acoustic backscatter of Ozette Lake, Washington
Offshore of the Pacific Northwest of the United States is the Cascadia Subduction Zone, a 1,000-kilometer-long tectonic boundary defined by a large fault, called a megathrust, that extends from the Mendocino Junction off northern California to the Nootka Fracture Zone off Vancouver Island, Canada (U.S. Geological Survey, 2023). The Juan de Fuca and Gorda oceanic plates to the west of...
June 6, 2024—InSAR image of deformation during Kīlauea Southwest Rift Zone eruption
This map shows recent deformation spanning the recent eruption at Kīlauea.
June 6, 2024 — Kīlauea Southwest Rift Zone eruption
This reference map depicts the June 3, 2024, eruption along Kīlauea's Southwest Rift Zone.
June 4, 2024 — Thermal maps of Kīlauea Southwest Rift Zone eruption
These two thermal maps were constructed from images captured during USGS Hawaiian Volcano Observatory helicopter overflights on June 3, 2024, at 6:00 a.m. HST (left) and June 4, 2024, at 12:00 p.m. HST (right).
June 3, 2024 —Kīlauea Southwest Rift Zone eruption reference map, updated as of 10PM HST
This reference map depicts the location and order of formation of fissure vents that began erupting from Kīlauea Southwest Rift Zone at approximately 12:30 a.m. HST on June 3, 2024.
June 3, 2024 —Kīlauea Southwest Rift Zone eruption reference map
This reference map depicts the approximate location of fissure vents that began erupting from Kīlauea Southwest Rift Zone at approximately 12:30 a.m. HST on June 3, 2024.
Surficial geology and Quaternary fault map of the Las Vegas Valley, Clark County, Nevada
The Surficial Geology and Quaternary Fault Map of the Las Vegas Valley, Clark County, Nevada is a 1:50,000-scale compilation of published 1:24,000-scale geologic maps integrated with new field and desktop mapping. This geologic map compilation and GIS database are part of a broader study on the Quaternary faults in the Las Vegas Valley, the results of which are summarized in this report...
Geologic map of the northwest flank of Mauna Loa volcano, Island of Hawai‘i, Hawaii
Mauna Loa, the largest active volcano on Earth, has erupted 34 times since written descriptions became available in A.D. 1832. The most recent eruption of Mauna Loa occurred on November 27, 2022, after a 38 year hiatus; it lasted for 12 days. Some eruptions began with only brief seismic unrest, whereas others followed several months to a year of increased seismicity. Once underway, Mauna...
May 5, 2024—InSAR image of deformation during Kīlauea upper East Rift Zone swar
This map shows recent deformation at Kīlauea from April 19 to May 5, 2024.
May 2, 2024—Summary map of recent unrest at Kīlauea volcano
This map shows recent unrest at Kīlauea volcano.
April 27, 2024—InSAR image of deformation during early Kīlauea upper East Rift Zone swarm
This map shows recent deformation at Kīlauea volcano, from April 5 to April 27, 2024, as recorded by the German Aerospace Center’s (DLR) TerraSAR-X satellite.