Abstract
Ground-based geomagnetic Pc5 (2–7 mHz) pulsations, caused by the passage of dense transients (density disturbances) in the solar wind, were analyzed. It was shown that intensive bursts can appear in the density of the solar wind and its fluctuations, up to Np ∼ 30–50 cm3, even during the most magnetically calm year in the past decades (2009). The analysis, performed using one of the latest methods of discrete mathematical analysis (DMA), is presented. The energy functional of a time-series fragment (called “anomaly rectification” in DMA terms) of two such events was calculated. It was established that fluctuations in the dynamic pressure (density) of the solar wind (SW) cause the global excitation of Pc5 geomagnetic pulsations in the daytime sector of the Earth’s magnetosphere, i.e., from polar to equatorial latitudes. Such pulsations started and ended suddenly and simultaneously at all latitudes. Fluctuations in the interplanetary magnetic field (IMF) have turned up to be less geoeffective in exciting geomagnetic pulsations than fluctuations in the SW density. The pulsation generation mechanisms in various structural regions of the magnetosphere were probably different. It was therefore concluded that the most probable source of ground-based pulsations are fluctuations of the corresponding periods in the SW density.
Similar content being viewed by others
References
Agayan, S.M., Bogoutdinov, Sh.R., Gvishiani, A.D., Graeva, E.M., Diament, M., Zlotnicki, J., and Rodkin, M.V., Issledovanie morfologii signala na osnove algoritmov nechetkoi logiki (Signal morphology analysis based on fuzzy logic algorithms), Geofiz. Issled., 2005, no. 1, pp. 143–155.
Bogoutdinov, Sh.R., Agayan, S.M., Gvishiani, A.D., Graeva, E.M., Rodkin, M.V., Zlotnicki, J., and Le Muél, J.L., Fuzzy logic algorithms in the analysis of electrotelluric data with reference to monitoring of volcanic activity, Izv., Phys. Solid Earth, 2007, no. 7, pp. 597–609.
Gvishiani, A.D., Agayan, S.M., and Bogoutdinov, Sh.R., Fuzzy recognition of anomalies in time series, Dokl. Earth Sci., 2008, vol. 421, no. 1, pp. 838–842.
Gvishiani, A.D., Agayan, S.M., Bogoutdinov, Sh.R., and Solov’ev, A.A., Discrete mathematical analysis and applications for geology and geophysics, Vestn. Kamchat. Reg. Assots. Uchebn. Nauchn. Tsentr, Ser.: Nauki Zemle, 2010, no. 2, pp. 109–125.
Gvishiani, A.D., Agayan, S.M., Bogoutdinov, Sh.R., Ledenev, A.V., Zlotnicki, J., and Bonnin, J., Matematicheskie metody geoinformatiki. II. Algoritmy nechetkoi logiki v zadachakh vydeleniya anomalii na vremennykh ryadakh (Mathematical methods of geoinformatics. II. Fuzzy logic algorithms in problems of identifying anomalies in time series), in Kibernetika sistemnyi analiz (Cybernetics System Analysis, Kiev), 2003, no. 4, pp. 103–111.
Gvishiani, A.D., Diament, M., Mikhailov, V.O., Galdeano, A., Agayan, S.M., Bogoutdinov, Sh.R., and Graeva, E.M., Artificial intelligence algorithms for magnetic anomaly clustering, Izv. Phys. Solid Earth, 2002, no. 7, pp. 545–559.
Han, D.-S., Yang, H.-G., Chen, Z.-T., Araki, T., Dunlop, M.W., Nose, M., Iyemori, T., Li, Q., Gao, Y.-F., and Yumoto, K., Coupling of perturbations in the solar wind density to global Pi3 pulsations: a case study, J. Geophys. Res., 2007, vol. 112, p. A05217. doi 10.1029/2010JA015299
Kanasevich, E.R., Analiz vremennykh posledovatel’nostei v geofizike (Time Sequence Analysis in Geophysics), Moscow: Nedra, 1985.
Kepko, L., Spence, H.E., and Singer, H.J., Ulf waves in the solar wind as direct drivers of magnetospheric pulsations, Geophys. Rev. Lett., 2002, vol. 29, no. 8, p. 1197. doi 10.1029/2001GL014405
Kessel, R.L., Solar wind excitation of Pc5 fluctuations in the magnetosphere and on the ground, J. Geophys. Res., 2008, vol. 113, p. A04202. doi 10.1029/2007JA012255
Kleimenova, N.G., Kozyreva, O.V., Schott, J.-J., Bitterly, M., and Bitterly, J., Geomagnetic pulsations of the Pc5–6 range at equatorial and low latitudes, Geomagn. Aeron., 2002, vol. 42, no. 4, pp. 445–453.
Kleimenova, N.G., Kozyreva, O.V., Bitterly, M., and Schott, J.-J., Long-period (1–6 mHz) geomagnetic pulsations during the initial phase of the big magnetic storm of February 21, 1994, Geomagn. Aeron., 2000, vol. 40, no. 4, pp. 420–429.
Kleimenova, N.G., Zelinsky, N.R., Kozyreva, O.V., Malysheva, L.M., Solov’ev, A.A., and Bogoutdinov, Sh.R., Pc3 geomagnetic pulsations at near-equatorial latitudes at the initial phase of the magnetic storm of April 5, 2010, Geomagn. Aeron., 2013, vol. 53, no. 3, pp. 313–320.
Liu, W., Sarris, T.E., Li, X., Ergun, R., Angelopoulos, V., Bonnell, J., and Glassmeier, K.H., Solar wind influence on Pc4 and Pc5 ULF wave activity in the inner magnetosphere, J. Geophys. Res., 2010, vol. 115, p. A12201. doi 10.1029/2010JA015299
Matsuoka, H., Takahashi, K., Yumoto, K., Anderson, B.J., and Sibeck, D.G., Observation and modeling of compressional Pi3 magnetic pulsations, J. Geophys. Res., 1995, vol. 100, no. 7A, pp. 12103–12115. doi 10.1029/94JA03368
Pathan, B.M., Kleimenova, N.G., Kozyreva, O.V., Rao, D.R.K., and Asinkai, R.L., Equatorial enhancement of Pc5–6 magnetic storm time geomagnetic pulsations, Earth, Planets, Space, 1999, vol. 51, pp. 959–964.
Rastogi, R.G., Longitudinal variation of sudden commencement of geomagnetic storm at equatorial stations, J. Geophys. Res., 1993, vol. 98, no. 9A, pp. 15411–15416.
Rostoker, G. and Sullivan, B.T., Polarization characteristics of Pc5 magnetic pulsations in the dusk hemisphere, Planet. Space Sci., 1987, vol. 35, pp. 429–438.
Sarma, S.V.S. and Sastry, T.S., On the equatorial electrojet influence on geomagnetic pulsation amplitudes, J. Atmos. Terr. Phys., 1995, vol. 57, pp. 749–754.
Sibeck, D.G., Boumjohan, W., and Lopez, R.E., Solar wind dynamic pressure variations and transient magnetospheric signatures, Geophys. Rev. Lett., 1989, vol. 16, pp. 13–18.
Takahashi, K., Yumoto, K., Claudepierre, S.G., Sanchez, E.R., Troshichev, O.A., and Janzhura, A.S., Dependence of the amplitude of Pc5-band magnetic field variations on the solar wind and solar activity, J. Geophys. Res., 2012, vol. 117, p. A04207. doi 10.1029/2011JA017120
Takahashi, K. and Ukhorskiy, A.Y., Solar wind control of Pc5 pulsation power at geosynchronous orbit, J. Geophys. Res., 2007, vol. 112, p. A11205. doi 10.1029/2007JA012483
Zelinsky, N.R., Kleimenova, N.G., Kozyreva, O.V., Agayan, S.M., Bogoutdinov, Sh.R., and Solov’ev, A.A., Algorithm for recognizing Pc3 geomagnetic pulsations in 1-s data from INTERMAGNET equatorial observatories, Izv., Phys. Solid Earth, 2014, vol. 50, no. 2, pp. 240–248.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © N.R. Zelinsky, N.G. Kleimenova, L.M. Malysheva, 2014, published in Geomagnetizm i Aeronomiya, 2014, Vol. 54, No. 4, pp. 489–495.
Rights and permissions
About this article
Cite this article
Zelinsky, N.R., Kleimenova, N.G. & Malysheva, L.M. Studies on the latitudinal distribution of ground-based geomagnetic pulsations and fluctuations in the interplanetary medium using discrete mathematical analysis methods. Geomagn. Aeron. 54, 449–455 (2014). https://doi.org/10.1134/S0016793214040082
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0016793214040082