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Planetary harmonics in the historical Hungarian aurora record (1523-1960) (1302.2190v1)

Published 9 Feb 2013 in astro-ph.EP, astro-ph.SR, physics.geo-ph, and physics.space-ph

Abstract: The historical Hungarian auroral record extends from 1523 to 1960 and is longer than the sunspot record. Harmonic analysis reveals four major multidecadal secular cycles forming an approximate harmonic set at periods of 42.85, 57.13, 85.7 and 171.4 years. These four frequencies are very close to the four major heliospheric oscillations relative to the center of mass of the solar system caused by Jupiter, Saturn, Uranus and Neptune. Similar frequencies are found in solar radiation models based on long cosmogenic isotope records (Steinhilber et al. 2012) and in long records of naked-eye sunspot observations (Vaquero et al., 2002). Harmonic regression models are used to reconstruct and forecast aurora and solar activity for the period 1956-2050. The model predicts: (1) the multidecadal solar minimum in the 1970s that is also observed in the sunspot record; (2) a solar maximum in 2000-2002 that is observed in the ACRIM total solar irradiance satellite composite; (3) a prolonged solar minimum centered in the 2030s. These findings support a hypothesis that the Sun, the heliosphere and the terrestrial magnetosphere are partially modulated by planetary gravitational and magnetic forces synchronized to planetary oscillations, as also found in other recent publications (Scafetta, 2010, 2012a, 2012c, 2012d; Abreu et al., 2012; Tan & Cheng, 2012).

Summary

  • The paper analyzes the historical Hungarian aurora record (1523-1960) to identify planetary harmonic frequencies correlating with solar and auroral activity.
  • The study identifies specific harmonic cycles (e.g., 42.85, 57.13 years) resembling outer planet synodic periods, suggesting planetary influence on solar movement and activity.
  • The findings support the hypothesis that planetary forces modulate solar activity, offering a potential predictive tool for space weather and forecasting future solar minima in the 2030s.

Analysis of Planetary Harmonics in the Historical Hungarian Aurora Record

The paper authored by Scafetta and Willson investigates the historical aurora record from Hungary spanning 1523 to 1960. This dataset has been examined to detect planetary harmonic frequencies and evaluate their correlation with solar and auroral activities. Analysis of this extensive temporal aurora dataset suggests that the auroral frequency is sensitive to planetary influences, aligning with heliospheric and solar dynamics traditionally observed through sunspot records.

Key Findings

The paper identifies four primary multidecadal cycles within the aurora data, indicating harmonic oscillations at approximately 42.85, 57.13, 85.7, and 171.4 years. These periods resemble major heliospheric oscillations associated with planetary alignments, specifically the synodic cycles of outer planets such as Jupiter, Saturn, Uranus, and Neptune. The authors suggest these oscillations in the auroral record correspond to resonance frequencies impacting the Sun's movement around the solar system's center of mass. Furthermore, comparable cycles are found in long-term solar radiation models, reinforcing the link between planetary configurations and solar phenomena.

The paper emphasizes the concordance of these auroral oscillations with an established pattern of solar activity, particularly during the Maunder and Dalton minima. The harmonic regression models project future solar activity, predicting significant solar minima in the 2030s and corroborating these predictions with several solar proxy datasets.

Implications

The implications of this research are multifaceted. The results support the hypothesis that planetary gravitational and magnetic forces could partly modulate solar activity. This offers a dimension of predictability concerning solar and auroral phenomena that might impact space weather forecasting. From a theoretical standpoint, the findings prompt further examination of how planetary alignments might synchronize with and influence solar activity cycles. The dataset extends knowledge beyond sunspot observations, which began with Galileo’s telescopic discoveries, enriching historical data for space weather studies.

Future Directions

This investigation opens avenues for more detailed studies on the solar-planetary interaction mechanism. The methodology suggests employing additional long-lived astronomical and proxy data sets to validate the existence and effects of such harmonics. Future developments might encompass detailed modeling of the gravitational and magnetic interactive processes, potentially integrating these findings into predictive models for solar cycles. Such an endeavor would demand both innovative observational techniques and advanced computation models, ideally spanning extensive temporal datasets.

Conclusion

The historical Hungarian aurora record offers substantial evidence for planetary harmonics influencing solar and geomagnetic activity. This paper elaborates on the synchronicity between distant celestial mechanics and terrestrial phenomena, providing a potential predictive tool for understanding the Sun’s behavior. Continued exploitation of similar datasets might refine current models, granting deeper insight into the intrinsic linkage of solar activity with planetary dynamics. As such, the research underscores a nuanced aspect of astrophysics worth detailed exploration and cross-validation.

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