The Study of Auroral Oval Position Changes in Terms of Moving of the Earth’s Magnetic Pole
The auroral oval is actually a natural coordinate system to which theoretically and practically the events of space geophysics in the ionosphere and magnetosphere are attached. The oval was built according to the International Geophysical Year more than 50 years ago and probably is related to the magnetic pole of the Earth, which has shifted over this time by more than 1500 km. It should be expected that the configuration and position of the auroral oval could also change. The purpose of this paper is to study the possible displacement of the auroral oval for various geomagnetic activity under current conditions of the position of the Earth’s magnetic pole. The article shows the aurora position relative to the magnetic pole at the present time by analyzing direct optical measurements at the stations of the Kola Peninsula (Lovozero) and Northern Scandinavia (Sodankyla, Kiruna).We have used the model of predicting auroral oval NORUSKA (Svalbard 2) for the comparison of experimental and calculated results. Numerical optical observations from the high apogee satellites during modern time also were used for definition of the oval position. To achieve the goal, precision data and a three-dimensional component model of the Earth’s magnetic field of SPbF IZMIRAN were used, taking into account the contribution of magnetic anomalies of the lithosphere in the height range from 80 to 400 km, obtained according to aeromagnetic, marine and aerospace imagery. The paper indicates that the displacement of the auroral oval position follows the displacement of the magnetic pole of the Earth and location of the magnetic anomalies of the lithosphere. These are the first results obtained on a limited number of measurements, and the work should be continued using more significant statistical material on a wide network of optical observation stations.
KeywordsDisplacement of auroral oval Magnetic anomalies
We thank the Editor Nadezhda Zolotova and the anonymous reviewers for their careful reading of our manuscript and their many insightful comments and suggestions which helped us to improve the manuscript.
- 1.Khorosheva, O.V.: Spatio-temporal distribution of auroras, 82 p. Nauka Publishing, Moscow (1967) (in Russian)Google Scholar
- 3.Lazutin, L.L.: The auroral oval is a beautiful but outdated paradigm. Solar-Terr. phys. 1(1), 23–35 (2015) (in Russian with English abstract)Google Scholar
- 5.Thébault E., et al.: International geomagnetic reference field: the 12th generation. Earth, Planets Space 67, 79 (2015)Google Scholar
- 6.Lazutin, L.L.: The impact of magnetic storms on the technosphere and the effect of the north magnetic pole shift, Troitsky variant, 17 July 2012. TrV–№ 108, p. 10 (2012)Google Scholar
- 7.Petrova, A.A.: Digital maps of the components of the magnetic field induction vector. In: Proc. IZMIRAN, Moscow, pp. 412–416 (2015) (in Russian)Google Scholar
- 8.Kopytenko, Y. A., Petrova, A. A.: The development and use of a component model of the Earth’s magnetic field for magnetic cartography and geophysics. Fundamentalnaya i Prikladnaya Gidrofizika 9(2), 88–96 (2016) (in Russian with English abstract)Google Scholar
- 9.Aurora—30 minute forecast/ OVATION-Prime Model// Current space weather conditions on NOAA Scales. https://www.swpc.noaa.gov/products/aurora-30-minute-forecast#
- 10.Sigernes, F., Dyrland, M., Brekke, P., Gjengedal, E.K., Chernouss, S., Lorentzen, D.A., Oksavik, K., Deehr, C.S.: Oval real-time prediction—SvalTrackII. OpticaPurayAplicada (OPA) 44, 599–603 (2011)Google Scholar
- 12.The Kiruna All-Sky camera. http://www2.irf.se/allsky/
- 13.Chernouss, S.A., Shagimuratov, I.I., Alpatov, V.V., Filatov, M.V., Budnikov, P.A.: Using of the auroral oval model in modern time. In: Proceedings of VI international conference atmosphere, ionosphere, safety, part 2, Kaliningrad, pp. 58–62 (2018)Google Scholar