Journal ArticleDOI
Two types of magnetospheric ELF chorus and their substorm dependences
TLDR
In this paper, the distribution of extremely low frequency (10-1500 Hz) magnetospheric chorus to all local times and latitudes is investigated in order to determine dependence on substorms, and to evaluate the conditions under which chorus is generated.Abstract:
The distribution of extremely low frequency (10-1500 Hz) magnetospheric chorus to all local times and latitudes is investigated in order to determine dependence on substorms, and to evaluate the conditions under which chorus is generated. The analysis carefully separates space and time effects by an investigation of data obtained by the OGO 5 search coil magnetometer. A study of spatial dependencies shows that chorus occurs in two magnetic regions: equatorial chorus is located near the equator, and high-latitude chorus is located above 15 degrees. An analysis of chorus in each of the regions illustrates that equatorial chorus is definitely related to substorm, whereas high-latitude chorus often occurs within magnetically quiet intervals.read more
Citations
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Journal ArticleDOI
The Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) on RBSP
Craig Kletzing,William S. Kurth,Mario H. Acuña,Robert J. MacDowall,Roy B. Torbert,T. F. Averkamp,D. Bodet,Scott R. Bounds,M. Chutter,John E. P. Connerney,D. Crawford,J. S. Dolan,R. T. Dvorsky,George Hospodarsky,J. Howard,Vania K. Jordanova,R. A. Johnson,D. L. Kirchner,B. T. Mokrzycki,G. Needell,J. Odom,D. Mark,R. F. Pfaff,J. R. Phillips,Chris Piker,S. L. Remington,Douglas E. Rowland,Ondrej Santolik,R. Schnurr,D. Sheppard,Charles W. Smith,Richard M. Thorne,J. Tyler +32 more
TL;DR: The Electric and Magnetic Field Instrument and Integrated Science (EMFISIS) investigation on the NASA Radiation Belt Storm Probes (now named the Van Allen Probes) mission provides key wave and very low frequency magnetic field measurements to understand radiation belt acceleration, loss, and transport.
Journal ArticleDOI
Relativistic theory of wave‐particle resonant diffusion with application to electron acceleration in the magnetosphere
TL;DR: In this paper, a model was proposed to account for the observed variations in the flux and pitch angle distribution of relativistic electrons during geomagnetic storms by combining pitch angle scattering by intense EMIC waves and energy diffusion during cyclotron resonant interaction with whistler mode chorus outside the plasmasphere.
Journal ArticleDOI
Radiation belt dynamics: The importance of wave-particle interactions
TL;DR: A review of recent advances in both understanding and global modeling of wave-particle interactions has led to a paradigm shift in our understanding of electron acceleration in the radiation belts; internal local acceleration, rather than radial diffusion, appears to be the dominant acceleration process during the recovery phase of magnetic storms.
Journal ArticleDOI
Corotating solar wind streams and recurrent geomagnetic activity: A review
Bruce T. Tsurutani,Bruce T. Tsurutani,Walter D. Gonzalez,Alicia L. Clúa de Gonzalez,Fernando L. Guarnieri,Nat Gopalswamy,Manuel Grande,Yohsuke Kamide,Yoshiya Kasahara,Gang Lu,Ian R. Mann,Robert L. McPherron,Finn Søraas,Vytenis M. Vasyliunas +13 more
TL;DR: In this paper, it was shown that geomagnetic storms associated with high-speed streams/CIRs will have the same initial, main, and recovery phases as those associated with ICME-related magnetic storms but that the interplanetary causes are considerably different.
Journal ArticleDOI
Substorm dependence of chorus amplitudes: Implications for the acceleration of electrons to relativistic energies
TL;DR: In this article, a survey of wave data from the CRRES Plasma Wave Experiment for lower band (0.1-0.5f(ce)) and upper band ( 0.5-1.0f(c)) chorus was presented to assess whether these waves could play an important role in the acceleration of a seed population of electrons to relativistic energies during and following geomagnetic storms.
References
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Journal ArticleDOI
Limit on stably trapped particle fluxes
Charles F. Kennel,H. E. Petschek +1 more
TL;DR: The limit on stably trapped particle fluxes determined theoretically and compared with data from Explorer satellites was first established in this paper, and the limit was later confirmed by the International Journal of Astronautics.
Journal ArticleDOI
An investigation of whistling atmospherics
TL;DR: In this article, the authors investigated the nature and origin of whistlers, which are sometimes observed at frequencies below 15 kc/s and were found to follow the lines of force of the earth's magnetic field.
Journal ArticleDOI
Postmidnight chorus: A substorm phenomenon
TL;DR: In this paper, the post-midnight chorus was detected in the midnight sector of the magnetosphere in conjunction with magnetospheric substorms and the characteristics of these emissions such as their frequency time structure, emission frequency with respect to the local equatorial electron gyrofrequency, intensity-time variation, and the average intensity were investigated.
Journal ArticleDOI
Plasma clouds in the magnetosphere.
S. E. DeForest,Carl E. McIlwain +1 more
TL;DR: Magnetospheric plasma clouds equatorial observation by ATS 5 satellite, revealing plasma injection during substorms and dispersion by earth magnetic and electric fields as mentioned in this paper, revealed plasma injection in the Earth magnetic field.
Journal ArticleDOI
A theory of discrete VLF emissions from the magnetosphere
TL;DR: Magnetospheric discrete VLF emissions, discussing gyroresonance extension, resonant electron and emission frequency are discussed in this article, where the authors also discuss the effect of gyroreance extension.