Victoria Langenheim, U.S. Geological Survey

Geophysical Vignettes from the Wine Country: What We've Learned about Basin and Fault Evolution

  • DINNER MEETING - Tuesday, February 12, 2008
  • Location: Stanford University

  • 5:30 PM-Social (3/4) Hour: . . . Hartley
  • 6:15 PM-Dinner: . . . Hartley
  • 7:30 PM-Meeting: . . . GeoCorner Room 320-105

    see Map showing Mitchell and GeoCorner Room 320

    Anyone wishing to attend the lecture only is welcome at no cost.

    This will be the 394th meeting since 1954


    set of three maps:  geology, gravity, and aeromag

    Ongoing geophysical studies in the northern San Francisco Bay area unveil the three-dimensional geometry of basins and faults east of the San Andreas Fault beneath Napa and Sonoma Valleys, San Pablo Bay, and the Santa Rosa Plain.  The relatively flat valley floors hide a complex basement surface that has implications for fault and basin evolution as well as seismic-hazard and ground-water studies in the area.  Basin effects may have contributed to significant damage caused by the 1906 San Francisco and 1969 Santa Rosa earthquakes in downtown Santa Rosa and to damage from the 2000 Yountville earthquake in the city of Napa.  Analysis of geophysical data suggests these valleys conceal basins that were formed by several, sometimes superposed mechanisms.

    About the Speaker

    photo of Vicki putting in a gravity station up on a hill with lots of flatland vista in the background

    Vicki Langenheim is a research geophysicist with the U.S. Geological Survey in Menlo Park, Calif., specializing in the application of gravity and magnetic methods to assessment of seismic hazards and groundwater resources throughout the western U.S.  She received a bachelor of science degree in geophysics from Stanford University and a master's degree in geology from University of California, Berkeley.

    Reservations: The preferred way to make reservations is simply to email John Spritzer at by February 8, tell him you will attend, commit to pay, and bring your payment to the meeting. John always emails a confirmation; if you don’t get one, assume email crashed yet again and email him a second time. A check made to “PGS” is preferred, payable at the meeting.

    If you want to pay in advance:

    Everyone (including Stanford folks now) Please make dinner reservations by February 8. Contact John Spritzer, at U.S. Geological Survey, 345 Middlefield Road, MS-973 Menlo Park, CA 94025, Tel.: (650) 329-4833. Send check made out to “PGS” to John.

    Dinner is $30.00. Includes wine (5:30 to 6:15 PM.) and dinner (6:15-7:30 PM.).

    For students from all universities and colleges, the dinner, including the social 3/4-hour, is $5.00 and is partially subsidized thanks to the School of Earth Sciences, Stanford University (Note, no-show reservations owe the full price).

    Doris, whose wonderful crew prepares our meals, asked that we let you know that people who are late RSVPing and people who show up without a reservation will be welcome but that they will be eating on paper plates with plastic utensils (food supply permitting).

    Dues for Academic Year 2007-2008 ($10.00) should be sent to John Spritzer, U.S. Geological Survey, 345 Middlefield Road, MS-973 _Menlo Park, CA 94025. John’s phone: (650) 329-4833.

    Officers: Tom Moore, President; Keith Howard, Vice President; Mike Diggles, Secretary; John Spritzer, Treasurer; Elizabeth Miller, PGS Stanford University Coordinator

    Campus map

    Future Events

    Date created: January 16, 2008
    Last modified: January 28, 2008
    Created by: Mike Diggles, Webmaster-Secretary, PGS.

    c/o U.S. Geological Survey, MS-951, 345 Middlefield Road, Menlo Park, CA 94025. (650) 329-5404. email Mike Diggles at

    Back to PGS Home Page