Abstract
Research Article| February 01, 1938 Depth and geographical distribution of deep-focus earthquakes B. GUTENBERG; B. GUTENBERG Search for other works by this author on: GSW Google Scholar C. F. RICHTER C. F. RICHTER Search for other works by this author on: GSW Google Scholar GSA Bulletin (1938) 49 (2): 249–288. https://doi.org/10.1130/GSAB-49-249 Article history received: 11 Aug 1937 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation B. GUTENBERG, C. F. RICHTER; Depth and geographical distribution of deep-focus earthquakes. GSA Bulletin 1938;; 49 (2): 249–288. doi: https://doi.org/10.1130/GSAB-49-249 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract HISTORICAL NOTEEarly in the history of seismology it was occasionally suggested that, in addition to earthquakes with foci comparatively near the surface of the earth, shocks might also originate at depths of the order of several hundred kilometers. However, down to a comparatively recent date, all such conclusions were either purely speculative or were based on inadequate or misinterpreted data.The first scientifically sound determinations of great focal depth were made by H. H. Turner (1922), the first results being published in 1922, followed by much more detailed and accurate work in connection with his editing of the International Seismological Summary. These conclusions were based on the abnormally early arrival of the first waves at distant observatories. However, he also reported several instances in which these first waves apparently arrived late at great distances, indicating focal depth less than normal, or “high focus.” In his first paper, shocks were . . . This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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