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  • Open Daily: 10am - 10pm
    Alley-side Pickup: 10am - 7pm

    3038 Hennepin Ave Minneapolis, MN
    612-822-4611

Open Daily: 10am - 10pm | Alley-side Pickup: 10am - 7pm
3038 Hennepin Ave Minneapolis, MN
612-822-4611
In-situ measurements of seismic velocities in the San Francisco Bay Region, Part III: USGS Open-File Report: 77-850

In-situ measurements of seismic velocities in the San Francisco Bay Region, Part III: USGS Open-File Report: 77-850

Gibbs, James F.
Fumal, Thomas E.
Et Al

Paperback

General Political Science

ISBN10: 1288905645
ISBN13: 9781288905645
Publisher: Bibliogov
Published: Mar 11 2013
Pages: 150
Weight: 0.62
Height: 0.32 Width: 7.44 Depth: 9.69
Language: English
Seismic wave velocities (compressional and shear) are important parameters for estimating the seismic response characteristics of various geologic units when subjected to strong earthquake ground shaking. Seismic velocities of various units often show a strong correlation with the amounts of damage following large earthquakes and have been used as a basis for certain types of seismic zonation studies. In the current program seismic velocities have been measured at 59 locations 1n the San Francisco Bay Region. This report is the third in a series of Open-File Reports and describes the in-situ velocity measurements at locations 35-59. At each location seismic travel times are measured in drill holes, normally at 2.5-m intervals to a depth of 30 m. Geologic logs are determined from drill cuttings, undisturbed (cored) samples, and penetrometer samples. The data provide a detailed comparison of geologic and seismic characteristics and provide parameters for estimating strong earthquake ground motions quantitatively at each of the sites. A major emphasis of this program is to obtain a detailed comparison of geologic and seismic data on a regional scale for use in seismic zonation.

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