Investigation of the Alaskan earthquake of May 4, 1934.

<p>The shock investigated occurred on May 4, 1934 at 4h. 36m. 10s. The epicenter given in The International Seismological Summary for 1934 is 61.5 degrees north latitude, 147.5 degrees west longitude and the probably error of the epicenter is ± 0.21 degrees.</p> <p>The procedure...

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Main Author: Fillippone, Walter Ross
Format: Others
Published: 1944
Online Access:https://thesis.library.caltech.edu/5666/1/Fillippone_wr_1944.pdf
Fillippone, Walter Ross (1944) Investigation of the Alaskan earthquake of May 4, 1934. Master's thesis, California Institute of Technology. doi:10.7907/HZ0X-MM45. https://resolver.caltech.edu/CaltechTHESIS:03312010-142759917 <https://resolver.caltech.edu/CaltechTHESIS:03312010-142759917>
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spelling ndltd-CALTECH-oai-thesis.library.caltech.edu-56662019-12-22T03:09:14Z Investigation of the Alaskan earthquake of May 4, 1934. Fillippone, Walter Ross <p>The shock investigated occurred on May 4, 1934 at 4h. 36m. 10s. The epicenter given in The International Seismological Summary for 1934 is 61.5 degrees north latitude, 147.5 degrees west longitude and the probably error of the epicenter is ± 0.21 degrees.</p> <p>The procedure of investigation consisted of using the S-P interval to find the origin time and subtracting the mean from the given times of P. However, when the residuals of given distance minus calculated distance was plotted against the azimuth, the resulting sine curve was displaced from the zero residual by three (3) seconds, indicating an incorrect origin time. A second origin time, 0 = zero, was calculated from the equation, 0 = (pP+P)/2 – (t_p+c), and the residuals plotted. The resulting curve was symmetric to the zero residual line and showed the epicenter to be 0.3 degrees to the south of its given location.</p> <p>The depth of focus was determined from the intervals of pP-P, sP-P, sS-S, PcP-P, and ScS-S, each interpolated from the corresponding tables in the reference papers.</p> 1944 Thesis NonPeerReviewed application/pdf https://thesis.library.caltech.edu/5666/1/Fillippone_wr_1944.pdf https://resolver.caltech.edu/CaltechTHESIS:03312010-142759917 Fillippone, Walter Ross (1944) Investigation of the Alaskan earthquake of May 4, 1934. Master's thesis, California Institute of Technology. doi:10.7907/HZ0X-MM45. https://resolver.caltech.edu/CaltechTHESIS:03312010-142759917 <https://resolver.caltech.edu/CaltechTHESIS:03312010-142759917> https://thesis.library.caltech.edu/5666/
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format Others
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description <p>The shock investigated occurred on May 4, 1934 at 4h. 36m. 10s. The epicenter given in The International Seismological Summary for 1934 is 61.5 degrees north latitude, 147.5 degrees west longitude and the probably error of the epicenter is ± 0.21 degrees.</p> <p>The procedure of investigation consisted of using the S-P interval to find the origin time and subtracting the mean from the given times of P. However, when the residuals of given distance minus calculated distance was plotted against the azimuth, the resulting sine curve was displaced from the zero residual by three (3) seconds, indicating an incorrect origin time. A second origin time, 0 = zero, was calculated from the equation, 0 = (pP+P)/2 – (t_p+c), and the residuals plotted. The resulting curve was symmetric to the zero residual line and showed the epicenter to be 0.3 degrees to the south of its given location.</p> <p>The depth of focus was determined from the intervals of pP-P, sP-P, sS-S, PcP-P, and ScS-S, each interpolated from the corresponding tables in the reference papers.</p>
author Fillippone, Walter Ross
spellingShingle Fillippone, Walter Ross
Investigation of the Alaskan earthquake of May 4, 1934.
author_facet Fillippone, Walter Ross
author_sort Fillippone, Walter Ross
title Investigation of the Alaskan earthquake of May 4, 1934.
title_short Investigation of the Alaskan earthquake of May 4, 1934.
title_full Investigation of the Alaskan earthquake of May 4, 1934.
title_fullStr Investigation of the Alaskan earthquake of May 4, 1934.
title_full_unstemmed Investigation of the Alaskan earthquake of May 4, 1934.
title_sort investigation of the alaskan earthquake of may 4, 1934.
publishDate 1944
url https://thesis.library.caltech.edu/5666/1/Fillippone_wr_1944.pdf
Fillippone, Walter Ross (1944) Investigation of the Alaskan earthquake of May 4, 1934. Master's thesis, California Institute of Technology. doi:10.7907/HZ0X-MM45. https://resolver.caltech.edu/CaltechTHESIS:03312010-142759917 <https://resolver.caltech.edu/CaltechTHESIS:03312010-142759917>
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