Map showing "Known Earthquakes of the United States". In: "Coming to grips with
the Earthquake Problem," by Nicholas H. Heck, 1931. Journal of the Franklin
Institute, Vol. 212, No. 3, pp. 269-303.
Image ID: cgs00096, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Photo Date: 1930 Ca.
Category: Geophysics Seismology/
• High Resolution Photo Available
of the U.S. Department of Commerce, National Oceanic & Atmospheric
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