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Rapid Variation of LOD and Solar Flares

Published online by Cambridge University Press:  07 August 2017

Chen Li ,
Li Zhian  and
Zhou Zhengfeng
Chen Li
Affiliation:
Dept. of Astronomy, Beijing Normal University 100875 Beijing, China
Li Zhian
Affiliation:
Dept. of Astronomy, Beijing Normal University 100875 Beijing, China
Zhou Zhengfeng
Affiliation:
Dept. of Astronomy, Beijing Normal University 100875 Beijing, China

Abstract

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The sequence of LOD in the period from 1988 to 1991 (which was published in Bulletin B by IERS) is analyzed. Using the method of multiple filter, all the periodic terms are removed. Therefore, the rapid and outstanding variations of LOD that greater than 0.1ms in May, 1989 and Jan., 1990 are shown in the residual series. Because of many bursts of solar flares in the period of Mar.8 to 16 and Nov.7 to 17, there are geomagnetic storms in Mar. and Nov.1989. The strong geomagnetic variation probably induces the rapid variation of LOD.

Type
Impact on Geodynamics
Information
Symposium - International Astronomical Union , Volume 156: Developments in Astrometry and their Impacts on Astrophysics , 1993 , pp. 317 - 321
Copyright
Copyright © Kluwer 

References

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