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Do slow orbital periodicities appear in the record of Earth's magnetic reversals?
Author(s) -
Stothers Richard B.
Publication year - 1987
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl014i011p01087
Subject(s) - myr , geology , earth's magnetic field , geomagnetic reversal , geophysics , series (stratigraphy) , eccentricity (behavior) , spectral analysis , astrophysics , physics , paleontology , astronomy , magnetic field , quantum mechanics , biochemistry , chemistry , genome , spectroscopy , political science , law , gene
Time‐series spectral analysis has been performed on the dates of geomagnetic reversals of the last 20 Myr BP and earlier. Possible evidence is found from the presence of high spectral peaks for two very long periodicities, 0.4 Myr and 1.3 Myr, that may be associated with slow variations of the Earth's orbital eccentricity as predicted by Berger. However, statistical significance tests and a number of other arguments do not confirm the two detections.