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GMEG - Geophysics Unit of Menlo Park, CA- (GUMP)


Geophysics Unit of Menlo Park, CA (GUMP)

U.S. Geological Survey - Western Region - Geology and Geophysics

Watt Main





Janet Watt

Geophysical Unit of Menlo Park, CA (GUMP)

U.S. Geological Survey
345 Middlefield Road, MS989
Menlo Park, CA 94025
phone: (650) 329-5307
fax: (650) 329-5133

Janet Watt


Janet Watt is a geophysicist with the U.S. Geological Survey working with the Western Region Earth Surface Processes Team in Menlo Park, California. Recently, her research has focused on theoretical and applied research utilizing potential-field methods to understand earthquake and volcano hazards, and mineral and water resources in the western U.S. She combines geologic, geophysical, and seismicity data to create 3D geologic models of geothermal resources in Nevada and of active fault systems in the San Francisco Bay Area and central California.


  • High-resolution marine magnetics and seismic reflection along the Hosgri Fault Zone, central California
  • Geohydrology of the Coast Ranges basins
  • 3D Geologic Mapping: Hayward Fault, Calaveras Fault, San Andreas Fault (central California), and the Great Basin
  • Concealed Deposits of the Great Basin
  • Monterey Bay Geophysics and Tectonics
  • Marine Geology and Geologic Hazards in the San Juan Islands, WA



Sliter, R.W., Triezenberg, P.J., Hart, P.E., Watt, J.T., Johnson, S.Y., and Scheirer, D.S., 2009, High-resolution seismic reflection and marine magnetic data along the Hosgri Fault Zone, central California: U.S. Geological Survey Open-File Report 2009-1100 at URL [].

Watt, J.T., Glen, J.M.G., John, D.A., Ponce, D.A., 2007, Three-dimensional geologic model of the northern Nevada rift and the Beowawe geothermal system, north-central Nevada, Geosphere, v. 3, no. 6, p.667-682. [ 3Dgeol_model.pdf ]

Watt, J.T., Ponce, D.A., 2007, Geophysical framework investigations influencing ground-water resources in east-central Nevada and west-central Utah, with a section on Geologic and geophysical basin-by-basin descriptions by Wallace, A.R., Watt, J.T., and Ponce, D.A.: U.S. Geological Survey Open-File Report 2007-1163, 41 p. 2 plates, scale 1:750,000 [available on the World WideWeb at URL [].


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National Archive of Marine Seismic Surveys
Virtual Tour of the Hayward Fault
USGS Western Coastal and Marine Geology
National Geophysical Database
Puget Sound Aeromagnetic Maps and Data
USGS Mineral Resources Program
Great Basin Geoscience Data Base
USGS publication warehouse
World Magnetic Anomaly Map
Moss Landing Marine Labs-Geological Oceanography

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