Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975azh....52.1108s&link_type=abstract
Astronomicheskii Zhurnal, vol. 52, Sept.-Oct. 1975, p. 1108-1112. In Russian.
Astronomy and Astrophysics
Astronomy
Atomic Clocks, Earth Rotation, Solar Activity Effects, Time Measurement, Velocity Distribution, Annual Variations, Periodic Variations, Solar Flares, Universal Time
Scientific paper
Calculations of velocity characteristics of the earth's rotation reported by the author (1971) for the years 1955.5 to 1971 are continued for the years 1972 to 1974. The characteristics are determined using both universal and atomic time scales. Between the years 1955.5 and 1972 the yearly mean rate of rotation of the earth decreased gradually, producing an increase of 0.00013 sec in the length of day by the beginning of 1972. This variation is irregular, with periodic short-term increases. The rate of rotation is lowest in April and November and attains relative maxima at the end of July and January. The annual increase in the rate of rotation at the end of July explains the apparent correlation of the solar flares of August, 1972 with a simultaneous increase in the rate of the earth's rotation.
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