"Earthquake Zones" by Captain Nicholas Heck, U.S. Coast and Geodetic Survey. Heck first produced a world seismicity map showing the activity on the Mid-Atlantic Ridge in 1932. (Courtesy of NOAA Photo Library.)
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"Earthquake Zones" by Captain Nicholas Heck, U.S. Coast and Geodetic Survey. Heck first produced a world seismicity map showing the activity on the Mid-Atlantic Ridge in 1932. (Courtesy of NOAA Photo Library.)
Related Links
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