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Published October 1939 | public
Journal Article

Depth and geographical distribution of deep-focus earthquakes (second paper)


This paper is a continuation of a previous publication (1938). The writers distinguish (1) shallow shocks, at depths not exceeding about 50 kilometers; (2) intermediate shocks, at depths from about 50 to 300 kilometers; (3) deep shocks. Separate maps are drawn for intermediate and for deep shocks, and new or revised determinations are presented and discussed. Previous conclusions as to mechanism and origin remain unmodified.

Additional Information

© 1939 Geological Society of America. Manuscript received by the Secretary of the Society, May 26, 1939.

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August 19, 2023
October 17, 2023