Influence of the moon on the earth’s magnetosphere at various phases of a solar activity cycle

We studied the dependence of the A p -index describing the geomagnetic disturbance on the Moon’s phase. We processed available data for cycles 20–23 of the solar activity by the epoch super-position method. We discovered that, in the declining branch of the solar cycle, the highest values of the A p...

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Bibliographic Details
Published in:Kinematics and physics of celestial bodies 2012-02, Vol.28 (1), p.39-42
Main Authors: Akimov, L. A., Dyatel, N. P.
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics
Geodetics
Magnetism
Moon
Observations and Techniques
Physics
Physics and Astronomy
Solar activity
Solar physics
Space Physics
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Summary:We studied the dependence of the A p -index describing the geomagnetic disturbance on the Moon’s phase. We processed available data for cycles 20–23 of the solar activity by the epoch super-position method. We discovered that, in the declining branch of the solar cycle, the highest values of the A p -index relative to an average value are observed near new moon. The difference of the A p -index values for new moon and full moon is approximately 18%. In the branch of increase and maximum of the solar cycle, we observed minimum values of the A p -index during several days before full moon, and maximum values of the A p -index take place during several days after full moon. The conclusion follows from this that the mechanism of the Moon’s effect on the earth’s magnetosphere is different essentially for intervals near new moon and full moon.
ISSN:0884-5913
1934-8401
DOI:10.3103/S0884591312010035