Field Activity 2025-639-FA

Identifier 2025-639-FA
Alternate names Eureka 2025
Purpose To deploy 1 new seafloor geodetic station and measure position at 4 stations in southern Cascadia
Equipment or personnel only. Data, if any, are managed under a different field activity.
Location Offshore Eureka, CA
Summary Seafloor geodetic measurement to understand plate locking in the subduction zone and gorda plate kinematics
Info derived Precise position
Projects
Platform
ATV
Other
Neil Armstrong
LOA: 238 ft; Beam: 50 ft.
Vehicles
MarFac; Ford 650 Box truck - White G71-03559
Itinerary
Start Eureka, CA 2025-08-10
End Eureka, CA 2025-09-30
Days in the field 5
Bounds
West -125.76782249
East -124.0429683
North 42.36936743
South 40.48873729
Marine operations Yes

Personnel

Organization Equipment or personnel support provided by
USGS, Earthquake Hazards
, CA
Organization Equipment or personnel support provided by
2885 Mission Street
Santa Cruz, CA95060
(831) 460-7401
Principal investigators Janet Tilden Watt
Crew members
Rachel K Marcuson
Scientist, Staff
Information specialist(s)
Janet Tilden Watt
Specialist, Information

Data types and categories

Data category: Location-Elevation
Data type: Benchmarks

Equipment used

Equipment Usage description Data types Datasets
GNSS-A Benchmarks (no data reported)

Publications

Samples collected during this field activity