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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 investigation acr

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 this boundary

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.

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 Loa’s eru

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.

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.

Seabed maps showing topography, ruggedness, backscatter intensity, sediment mobility, and the distribution of geologic substrates in quadrangle 5 of the Stellwagen Bank National Marine Sanctuary region offshore of Boston, Massachusetts

The U.S. Geological Survey, in cooperation with the National Marine Sanctuary Program of the National Oceanic and Atmospheric Administration, has conducted seabed mapping and related research in the Stellwagen Bank National Marine Sanctuary (SBNMS) region since 1993. The area being mapped using geophysical and geological data includes the SBNMS and the surrounding region, which totals approximatel