In:
Journal of Geophysical Research: Solid Earth, American Geophysical Union (AGU), Vol. 87, No. B4 ( 1982-04-10), p. 2851-2859
Abstract:
Stress‐induced piezoelectric fields produce freely propagating electromagnetic radiation when microscopic rock fractures occur in quartz‐bearing rocks. A laboratory study is presented which shows that electromagnetic emissions are produced when microfractures occur in Westerly granite. A detailed model is presented for the emission process which allows an estimate of the total radiated power from an individual microfracture. On the basis of these results a case is presented that an unusual radio emission seen on several widely separated radio astronomy receivers in the northern hemisphere on May 16, 1960, was due to a stress‐induced microfracture along the Chilean fault. This radio event occurred 6 days prior to the great Chilean earthquake of May 22, 1960, and may have been a precursor to one of the largest earthquakes of this century.
Type of Medium:
Online Resource
ISSN:
0148-0227
DOI:
10.1029/JB087iB04p02851
Language:
English
Publisher:
American Geophysical Union (AGU)
Publication Date:
1982
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