Kinetic Alfvén waves and particle response associated with a shock-induced, global ULF perturbation of the terrestrial magnetosphere
[5];
- Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder Colorado USA
- Space Sciences Department, Aerospace Corporation, El Segundo California USA
- The Johns Hopkins University Applied Physics Laboratory, Laurel Maryland USA
- School of Physics and Astronomy, University of Minnesota, Minneapolis Minnesota USA
- Los Alamos National Laboratory, Los Alamos New Mexico USA
- Department of Physics and Astronomy, University of Iowa, Iowa City Iowa USA
On 2 October 2013, the arrival of an interplanetary shock compressed the Earth's magnetosphere and triggered a global ULF (ultra low frequency) oscillation. Furthermore, the Van Allen Probe B spacecraft observed this large-amplitude ULF wave in situ with both magnetic and electric field data. Broadband waves up to approximately 100 Hz were observed in conjunction with, and modulated by, this ULF wave. Detailed analysis of fields and particle data reveals that these broadband waves are Doppler-shifted kinetic Alfvén waves. This event then suggests that magnetospheric compression by interplanetary shocks can induce abrupt generation of kinetic Alfvén waves over large portions of the inner magnetosphere, potentially driving previously unconsidered wave-particle interactions throughout the inner magnetosphere during the initial response of the magnetosphere to shock impacts.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- National Aeronautic and Space Administration (NASA); USDOE
- Grant/Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1402591
- Report Number(s):
- LA-UR-15-27236
- Journal Information:
- Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 21 Vol. 42; ISSN 0094-8276
- Publisher:
- American Geophysical UnionCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Global mode ULF pulsations in a magnetosphere with a nonmonotonic Alfven velocity profile
Relativistic electron dynamics produced by azimuthally localized poloidal mode ULF waves: Boomerang-shaped pitch angle evolutions