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![Ground shaker at Position A theb1335.jpg Ground shaker at Position A](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb1335.jpg?itok=sc5fVsao)
Description
Ground shaker at Position A.Used to determine earthquake engineering characteristics of buildings.C&GS; was the first organization to undertake engineering seismology studies.Party of William D. Patterson (Image credit: C&GS; Season's Report Patterson 1937-6)
Credit
C&GS; Season's Report Patterson 1937-6
Display Date
1937
Location
California
Collection
Historic Coast & Geodetic Survey
Keywords
Geophysics
Seismology