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Waves and Currents Recorded by Electromagnetic Barographs

Waves and Currents Recorded by Electromagnetic Barographs BULLETI N OF THE AMERICA N METEOROLOGICAL SOCIETY Entered as second class matter at the Post Office, Worcester, Massachusetts, under Act of Aug. 24, 1912. Issued monthly except July and August. Annual subscription, $3.00; single copies of this issue, 35c. Address all communication* to ROBER T G. STONE, Editor Blue Hill Observatory, Harvard University Milton, Mass., U. S. A. Vol . 20 DECEMBER, 1939 No. 10 XL BENIOFF AND B . GUTENBERG Seismological Laboratory, California Institute of Technology, Pasadena crobarograph consists of a permanent OR SOME 40 years it has been known as a result of seismo- magnet moving-conductor type loud- speaker mounted in one of the sides graph observations that the of a sealed container of approxi- ground is never at rest. One of the mately one-fifth cubic meter capacity. characteristic types of ground unrest See Figure 1. The effective diameter appears in the form of fairly regular wave trains having predominant pe- riods in the range 4 to 10 seconds. These have been observed over the whole earth. Two hypotheses have been suggested as to the origin of these "microseisms". One that they are a result of the action of large surface waves on a steep shore. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Bulletin of the American Meteorological Society American Meteorological Society

Waves and Currents Recorded by Electromagnetic Barographs

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Publisher
American Meteorological Society
Copyright
Copyright © American Meteorological Society
ISSN
1520-0477
eISSN
1520-0477
DOI
10.1175/1520-0477-20.10.421
Publisher site
See Article on Publisher Site

Abstract

BULLETI N OF THE AMERICA N METEOROLOGICAL SOCIETY Entered as second class matter at the Post Office, Worcester, Massachusetts, under Act of Aug. 24, 1912. Issued monthly except July and August. Annual subscription, $3.00; single copies of this issue, 35c. Address all communication* to ROBER T G. STONE, Editor Blue Hill Observatory, Harvard University Milton, Mass., U. S. A. Vol . 20 DECEMBER, 1939 No. 10 XL BENIOFF AND B . GUTENBERG Seismological Laboratory, California Institute of Technology, Pasadena crobarograph consists of a permanent OR SOME 40 years it has been known as a result of seismo- magnet moving-conductor type loud- speaker mounted in one of the sides graph observations that the of a sealed container of approxi- ground is never at rest. One of the mately one-fifth cubic meter capacity. characteristic types of ground unrest See Figure 1. The effective diameter appears in the form of fairly regular wave trains having predominant pe- riods in the range 4 to 10 seconds. These have been observed over the whole earth. Two hypotheses have been suggested as to the origin of these "microseisms". One that they are a result of the action of large surface waves on a steep shore.

Journal

Bulletin of the American Meteorological SocietyAmerican Meteorological Society

Published: Dec 1, 1939

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