Second harmonic poloidal waves observed by Van Allen Probes in the dusk‐midnight sector

Min, Kyungguk; Takahashi, Kazue; Ukhorskiy, Aleksandr Y.; Manweiler, Jerry W.; Spence, Harlan E.; Singer, Howard, J.; Claudepierre, Seth G.; Larsen, Brian A.; Soto‐Chavez, A. Rualdo; Cohen, Ross J.

doi:10.1002/2016ja023770

i

Second harmonic poloidal waves observed by Van Allen Probes in the dusk‐midnight sector

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2017
By Min, Kyungguk ; Takahashi, Kazue ; Ukhorskiy, Aleksandr Y. ; ...

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Journal Title:

Journal of Geophysical Research: Space Physics
Personal Author:

Min, Kyungguk ; Takahashi, Kazue ; Ukhorskiy, Aleksandr Y. ; Manweiler, Jerry W. ; Spence, Harlan E. ; Singer, Howard, J. ; Claudepierre, Seth G. ; Larsen, Brian A. ; Soto‐Chavez, A. Rualdo ; Cohen, Ross J.
NOAA Program & Office:

NWS (National Weather Service) ; SWPC (Space Weather Prediction Center)
Description:

Thispaperpresentsobservationsofultralow-frequency(ULF)wavesfromVanAllenProbes. The event that generated the ULF waves occurred 2 days after a minor geomagnetic storm during a geomagnetically quiet time. Narrowband pulsations with a frequency of about 7 mHz with moderateamplitudeswereregisteredinthepremidnightsectorwhenProbeAwaspassingthroughanenhanced densityregionneargeosynchronousorbit.ProbeB,whichpassedthroughtheregionearlier,didnotdetect thenarrowbandpulsationsbutonlybroadbandnoise.Despitethesingle-spacecraftmeasurements,wewereabletodeterminevariouswaveproperties.Weﬁndthat(1)theobservedwavesareasecondharmonic poloidal mode propagating westward with an azimuthal wave number estimated to be ∼100; (2) the
Keywords:

Geophysics Space And Planetary Science Space And Planetary Science Space And Planetary Science
Source:

Journal of Geophysical Research: Space Physics, 122(3), 3013-3039
DOI:

https://doi.org/10.1002/2016ja023770
ISSN:

2169-9380 ; 2169-9402
Format:

PDF
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
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Other
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Library
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urn:sha256:063b24501ff6de0d4d48de89081948d79f27dce8e6b3edd9f9fd433fdd758feb
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https://repository.library.noaa.gov/view/noaa/54108/noaa_54108_DS1.pdf
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[PDF - 6.38 MB ]

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