Micropulsation measurements during the Puget Sound earthquake of April 29, 1965

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Geo-Astrophysics Laboratory, 1966 - Nature - 22 pages
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The emf's induced in micropulsation coils were analyzed to compute an epicenter and to look for possible magnetic signals generated by the Puget Sound earthquake of April 29, 1965. The epicenter calculated by this method agrees with that published by Algermissen and Hardy (1965) within the limits of experimental error. The search for magnetic precursors yielded negative results. The upper limit to the dipole moment of the stressed region was determined to be 2.5 x 10 to the 13th power cgs emu. It is concluded that, at least in this area, the possibility of using the piezomagnetic effect as a useful pre-indication of earthquake activity is rather remote. (Author).

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Contents

ANALYSIS OF DATA
5
MAGNETIC PRECURSORS
8
REFERENCES
11

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