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Localizing Sources of Pc1 Geomagnetic Pulsations

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Bulletin of the Russian Academy of Sciences: Physics Aims and scope

Abstract

The position of zones of ion-cyclotron instability is analyzed in relation to the plasmasphere in the period 00:00 to 08:00 UT on September 11, 2017, using proton flux measurements made by low-orbit satellites. The position and dynamics of these zones help explain the structure and dynamics of the spectrum of geomagnetic pulsations in the range 0.2 to 4 Hz observed on the surface of Earth at this time.

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ACKNOWLEDGMENTS

We are grateful to NOAA for POES data provided through the CDAWeb system (https://cdaweb.gsfc.nasa.gov); and to the Applied Physics Laboratory of Johns Hopkins University for providing the DMSP/SSUSI data (http://ssusi.jhuapl.edu).

The authors thank J. H. King and N. Papitashvili (AdnetSystems, NASA GSFC) for providing via CDAWeb the OMNI 5-Minute Data used in the plasmapause modeling.

Funding

The analysis of the data from POES and ground-based observations was performed as part of State Task no. AAAA A 18-118012490100-7. It was additionally supported by the Academy of Finland, project no. 330783.

The plasmapause modeling was supported by NASA (project RBSP-ECT of the Van Allen Probes mission), NASA’s Heliophysical Research Program (project NNX07AG48G), and the US National Science Foundation’s Geocosmic Environment Modeling Program (project ATM0902591).

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Correspondence to T. A. Yahnina.

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Translated by B. Shubik

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Yahnina, T.A., Yahnin, A.G., Raita, T. et al. Localizing Sources of Pc1 Geomagnetic Pulsations. Bull. Russ. Acad. Sci. Phys. 85, 334–339 (2021). https://doi.org/10.3103/S1062873821030308

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  • DOI: https://doi.org/10.3103/S1062873821030308

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