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Heliogeophysical electromagnetic variations and measurements of the gravitational constant

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Abstract

The results of repeated measurements of the gravitational constant by the Karagioz-Izmailov setup (1991) are compared with heliogeophysical indices. It is found that the extremely high values of the measured constant coincide with magnetic-activity minima. The variance of day-by-day measurement results increases with the decrease of the magnetic activity and with the rise of the level of ionospheric disturbances. It follows from our analysis that the setup is possibly affected by amplitude-spectrum variations in VLF background electromagnetic fields. Such variations seem to influence the elasticity coefficient of the suspension filament of the torsion pendulum through the magnetoplasticity effect.

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... The difference in G between the two methods was 4.6 × 10 −15 m 3 ·kg −1 ·s −2 or ~70 ppm. The difference is within the range of 10 −4 which was considered by Vladimirskii [2] to be the boundary for accuracy to infer G with torsion balances. Vladimirskii [2] and later Vladimirsky and Bruns [3] reported a source of variability that could account for the spread in G of ~400 ppm noted by Quinn et al. [1]. ...
... The difference is within the range of 10 −4 which was considered by Vladimirskii [2] to be the boundary for accuracy to infer G with torsion balances. Vladimirskii [2] and later Vladimirsky and Bruns [3] reported a source of variability that could account for the spread in G of ~400 ppm noted by Quinn et al. [1]. ...
... This source involved heliophysical perturbations as inferred by inferences of geomagnetic activity. Subtle variations in G which are systematically and quantitatively related to alterations in geomagnetic activity could be secondary to direct influences upon instrumentation [2] [3]. However if there is a third variable that is shared by both variation in G and geomagnetic activity, it may have both theoretical and practical significance. ...
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... Persinger and St-Pierre [74] quantitatively examined the results from the recent work by Quinn and his colleagues [75] and Vladimirsky et al. [76,77] from about twenty years ago. Both groups of researchers had found fluctuations in G that were in the range of 3·10 -3 of the average value for G. ...
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