pl23_theb1335.jpg
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https://www.noaa.gov/media/digital-library-photo/pl23theb1335jpgDescription
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
Credit
C&GS; Season's Report Patterson 1937-6
Display Date
1937
Location
California
Collection
Historic Coast & Geodetic Survey
Keywords
Geophysics
Seismology