Spectral Analysis of Geomagnetic Activity Indices and Solar Wind Parameters

Kim, Jung-Hee;Chang, Heon-Young

  • Received : 2014.04.14
  • Accepted : 2014.05.30
  • Published : 2014.06.15


Solar variability is widely known to affect the interplanetary space and in turn the Earth's electromagnetical environment on the basis of common periodicities in the solar and geomagnetic activity indices. The goal of this study is twofold. Firstly, we attempt to associate modes by comparing a temporal behavior of the power of geomagnetic activity parameters since it is barely sufficient searching for common peaks with a similar periodicity in order to causally correlate geomagnetic activity parameters. As a result of the wavelet transform analysis we are able to obtain information on the temporal behavior of the power in the velocity of the solar wind, the number density of protons in the solar wind, the AE index, the Dst index, the interplanetary magnetic field, B and its three components of the GSM coordinate system, $B_X$, $B_Y$, $B_Z$. Secondly, we also attempt to search for any signatures of influence on the space environment near the Earth by inner planets orbiting around the Sun. Our main findings are as follows: (1) Parameters we have investigated show periodicities of ~ 27 days, ~ 13.5 days, ~ 9 days. (2) The peaks in the power spectrum of $B_Z$ appear to be split due to an unknown agent. (3) For some modes powers are not present all the time and intervals showing high powers do not always coincide. (4) Noticeable peaks do not emerge at those frequencies corresponding to the synodic and/or sidereal periods of Mercury and Venus, which leads us to conclude that the Earth's space environment is not subject to the shadow of the inner planets as suggested earlier.


Solar wind;IMF;data analysis


  1. Prestes A, Rigozo NR, Echer E, Vieira LEA, Spectral Analysis of Sunspot Number and Geomagnetic Indices (1868-2001), JASTP, 68, 182-190 (2006).
  2. Obridko VN, Shelting BD, Occurrence of the 1.3-year Periodicity in the Large-scale Solar Magnetic Field for 8 Solar Cycles, Adv. Space Res., 40, 1006-1014 (2007).
  3. Park JH, Chang HY, Drought over Seoul and Its Association with Solar Cycles, JASS, 30, 241-246 (2013).
  4. Prabhakaran Nayar SR, Sanalkumaran Nair V, Radhika VN, Revathy K, Short-Period Features of the Interplanetary Plasma and Their Evolution, Sol. Phys., 201, 405-417 (2001).
  5. Richardson JD, Paularena KI, Belcher JW, Lazarus AJ, Solar Wind Oscillations with a 1.3 Year Period, Geophys. Res. Lett, 21, 1559-1560 (1994).
  6. Ruzmaikin A, Cadavid AC, Lawrence J, Quasi-periodic Patterns Coupling the Sun, Solar Wind and the Earth, JASTP, 70, 2112-2117 (2008).
  7. Russell CT, MePherron RL, Semiannual Variation of Geomagnetic Activity, JGR, 78, 92- 108 (1973).
  8. Singh YP, Gautam S, Badruddin, Temporal Variations of Short-and Mid-term Periodicities in Solar Wind Parameters and Cosmic Ray Intensity, JASTP, 89, 48-53 (2012).
  9. Kane RP, Quasi-biennial and Quasi-triennial Oscillations in Geomagnetic Activity Indices, An. Geo., 15, 1581-1594 (1997).
  10. Emery BA, Richardson IG, Evans DS, Rich FJ, Wilson GR, Solar Rotational Periodicities and the Semiannual Variation in the Solar Wind, Radiation Belt, and Aurora, Sol. Phys., 274, 399-425 (2011).
  11. Howe R, Christensen-Dalsgaard J, Hill F, Komm RW, Larsen RM, et al., Dynamic Variations at the Base of the Solar Convection Zone, Sci., 287, 2456-2460 (2000).
  12. Kane RP, Power Spectrum Analysis of Geomagnetic Activity Indices, in Proceeding of the Indian Academy of Sciences-Earth Planet. Sci., 95, 1-12 (1986).
  13. Kane RP, Differences in the Quasi-biennial Oscillation and Quasi-triennial Oscillation Characteristics of the Solar, Interplanetary, and Terrestrial Parameters, JGR, 110, A01108 (2005).
  14. Kim JH, Chang HY, Do Inner Planets Modulate the Space Environment of the Earth?, JASS, 31, 7-13 (2014).
  15. Komm R, Howe R, Hill F, Helioseismic Sensing of the Solar Cycle, Adv. Space Res., 38, 845-855 (2006).
  16. Komm R, Howe R, Durney BR, Hill F, Temporal Variation of Angular Momentum in the Solar Convection Zone, ApJ, 586, 650-662 (2003).
  17. Mendoza B, Velasco VM, Valdes-Galicia JF, Mid-term Periodicities in the Solar Magnetic Flux, Sol. Phys., 233, 319-330 (2006).
  18. Mursula K, Zieger B, The 13.5-day Periodicity in the Sun, Solar Wind, and Geomagnetic Activity: The Last Three Solar Cycles, JGR, 101, 27077-27090 (1996).
  19. Mursula K, Zieger B, The 1.3-Year Variation in Solar Wind and Geomagnetic Activity, Adv. Space Res., 25, 1939-1942 (2000).
  20. Charan Dwivedi V, Tiwari DP, Agrawal SP, Study of the Longterm Variability of Interplanetary Plasma and Fields as a Link for Solar-terrestrial Relationships, JGR, 114, A05108 (2009).
  21. Chang HY, Analysis of Stellar Oscillation Data, PhD Dissertation, University of Cambridge (1995).
  22. Cho IH, Chang HY, Latitudinal Distribution of Sunspots Revisited, JASS, 28, 1-7 (2011).
  23. Cho IH, Hwang J, Park YD, Revisiting Solar and Heliospheric 1.3-Year Signals during 1970-2007, Sol. Phys., 289, 707-719 (2014).
  24. Clua de Gonzalez AL, Gonzalez WD, Dutra SLG, Periodic Variation in the Geomagnetic Activity: A study based on the Ap Index, JGR, 98, 9215-9231 (1993).
  25. Clua de Gonzalez AL, Silbergleit VM, Gonzalez WD, Tsurutani BT, Annual Variation of Geomagnetic Activity, JASTP, 63, 367-374 (2001).
  26. Clua de Gonzalez AL, Silbergleit VM, Gonzalez WD, Tsurutani BT, Irregularties in the Semiannual Variation of the Geomagnetic Activity, Adv. Space Res., 30, 2215-2218 (2002).
  27. De Artigas MZ, Elias AG, de Campra PF, Discrete Wavelet Analysis to Assess Long-term Trends in Geomagnetic Activity, Phys. Chem. Earth, 31, 77-80 (2006).

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