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![The correlation of high seismicity with the Mid-Atlantic Ridge cgs02174.jpg The correlation of high seismicity with the Mid-Atlantic Ridge](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_cgs02174.jpg?itok=einnuj7g)
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The correlation of high seismicity with the Mid-Atlantic Ridge. This map wasproduced in 1937. Note the refinement of earthquake zones on this map ascompared to the map in image cgs02176. In: Proceedings of the AmericanPhilosophical Society, Vol. 79, No. 1, Symposium on the Exploration of the Ocean Bottom Arranged by the American Geophysical Union (April 21, 1938), pp. 97-108. (Image credit: Collected Papers of Captain Nicholas Heck, NOAA Central Library)