Van Allen Probes observations of unusually low frequency whistler mode waves observed in association with moderate magnetic storms: Statistical study
We show the first evidence for locally excited chorus at frequencies below 0.1 f ce (electron cyclotron frequency) in the outer radiation belt. A statistical study of chorus during geomagnetic storms observed by the Van Allen Probes found that frequencies are often dramatically lower than expected....
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Cattell, C. A [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2015 |
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| Rechteinformationen: |
Nutzungsrecht: © 2015. The Authors. |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Geophysical research letters - Washington, DC : Union, 1974, 42(2015), 18, Seite 7273-7281 |
|---|---|
| Übergeordnetes Werk: |
volume:42 ; year:2015 ; number:18 ; pages:7273-7281 |
| Links: |
|---|
| DOI / URN: |
10.1002/2015GL065565 |
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OLC1969325925 |
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| 520 | |a We show the first evidence for locally excited chorus at frequencies below 0.1 f ce (electron cyclotron frequency) in the outer radiation belt. A statistical study of chorus during geomagnetic storms observed by the Van Allen Probes found that frequencies are often dramatically lower than expected. The frequency at peak power suddenly stops tracking the equatorial 0.5 f ce and f / f ce decreases rapidly, often to frequencies well below 0.1 f ce (in situ and mapped to equator). These very low frequency waves are observed both when the satellites are close to the equatorial plane and at higher magnetic latitudes. Poynting flux is consistent with generation at the equator. Wave amplitudes can be up to 20 to 40 mV/m and 2 to 4 nT. We conclude that conditions during moderate to large storms can excite unusually low frequency chorus, which is resonant with more energetic electrons than typical chorus, with critical implications for understanding radiation belt evolution. Chorus can be locally excited below 0.1 fce down to flh in outer radiation belt Frequency rapidly decreases below usual values, thus resonating with more energetic electrons Usually seen near minimum in Dst with implications for radiation belt evolution | ||
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10.1002/2015GL065565 doi PQ20160211 (DE-627)OLC1969325925 (DE-599)GBVOLC1969325925 (PRQ)p1836-1bf027462747a288ac0a98b9e9a7a5e05345a135d10cbd1051e904e110e7798a0 (KEY)0026932820150000042001807273vanallenprobesobservationsofunusuallylowfrequencyw DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Cattell, C. A verfasserin aut Van Allen Probes observations of unusually low frequency whistler mode waves observed in association with moderate magnetic storms: Statistical study 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We show the first evidence for locally excited chorus at frequencies below 0.1 f ce (electron cyclotron frequency) in the outer radiation belt. A statistical study of chorus during geomagnetic storms observed by the Van Allen Probes found that frequencies are often dramatically lower than expected. The frequency at peak power suddenly stops tracking the equatorial 0.5 f ce and f / f ce decreases rapidly, often to frequencies well below 0.1 f ce (in situ and mapped to equator). These very low frequency waves are observed both when the satellites are close to the equatorial plane and at higher magnetic latitudes. Poynting flux is consistent with generation at the equator. Wave amplitudes can be up to 20 to 40 mV/m and 2 to 4 nT. We conclude that conditions during moderate to large storms can excite unusually low frequency chorus, which is resonant with more energetic electrons than typical chorus, with critical implications for understanding radiation belt evolution. Chorus can be locally excited below 0.1 fce down to flh in outer radiation belt Frequency rapidly decreases below usual values, thus resonating with more energetic electrons Usually seen near minimum in Dst with implications for radiation belt evolution Nutzungsrecht: © 2015. The Authors. chorus outer radiation belt Lightning Jupiter Breneman, A. W oth Kletzing, C. A oth Wygant, J. R oth Kurth, W. S oth Thaller, S. A oth Enthalten in Geophysical research letters Washington, DC : Union, 1974 42(2015), 18, Seite 7273-7281 (DE-627)129095109 (DE-600)7403-2 (DE-576)01443122X 0094-8276 nnns volume:42 year:2015 number:18 pages:7273-7281 http://dx.doi.org/10.1002/2015GL065565 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2015GL065565/abstract http://search.proquest.com/docview/1722618749 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_47 GBV_ILN_62 GBV_ILN_154 GBV_ILN_601 GBV_ILN_2279 38.70 AVZ AR 42 2015 18 7273-7281 |
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10.1002/2015GL065565 doi PQ20160211 (DE-627)OLC1969325925 (DE-599)GBVOLC1969325925 (PRQ)p1836-1bf027462747a288ac0a98b9e9a7a5e05345a135d10cbd1051e904e110e7798a0 (KEY)0026932820150000042001807273vanallenprobesobservationsofunusuallylowfrequencyw DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Cattell, C. A verfasserin aut Van Allen Probes observations of unusually low frequency whistler mode waves observed in association with moderate magnetic storms: Statistical study 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We show the first evidence for locally excited chorus at frequencies below 0.1 f ce (electron cyclotron frequency) in the outer radiation belt. A statistical study of chorus during geomagnetic storms observed by the Van Allen Probes found that frequencies are often dramatically lower than expected. The frequency at peak power suddenly stops tracking the equatorial 0.5 f ce and f / f ce decreases rapidly, often to frequencies well below 0.1 f ce (in situ and mapped to equator). These very low frequency waves are observed both when the satellites are close to the equatorial plane and at higher magnetic latitudes. Poynting flux is consistent with generation at the equator. Wave amplitudes can be up to 20 to 40 mV/m and 2 to 4 nT. We conclude that conditions during moderate to large storms can excite unusually low frequency chorus, which is resonant with more energetic electrons than typical chorus, with critical implications for understanding radiation belt evolution. Chorus can be locally excited below 0.1 fce down to flh in outer radiation belt Frequency rapidly decreases below usual values, thus resonating with more energetic electrons Usually seen near minimum in Dst with implications for radiation belt evolution Nutzungsrecht: © 2015. The Authors. chorus outer radiation belt Lightning Jupiter Breneman, A. W oth Kletzing, C. A oth Wygant, J. R oth Kurth, W. S oth Thaller, S. A oth Enthalten in Geophysical research letters Washington, DC : Union, 1974 42(2015), 18, Seite 7273-7281 (DE-627)129095109 (DE-600)7403-2 (DE-576)01443122X 0094-8276 nnns volume:42 year:2015 number:18 pages:7273-7281 http://dx.doi.org/10.1002/2015GL065565 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2015GL065565/abstract http://search.proquest.com/docview/1722618749 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_47 GBV_ILN_62 GBV_ILN_154 GBV_ILN_601 GBV_ILN_2279 38.70 AVZ AR 42 2015 18 7273-7281 |
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10.1002/2015GL065565 doi PQ20160211 (DE-627)OLC1969325925 (DE-599)GBVOLC1969325925 (PRQ)p1836-1bf027462747a288ac0a98b9e9a7a5e05345a135d10cbd1051e904e110e7798a0 (KEY)0026932820150000042001807273vanallenprobesobservationsofunusuallylowfrequencyw DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Cattell, C. A verfasserin aut Van Allen Probes observations of unusually low frequency whistler mode waves observed in association with moderate magnetic storms: Statistical study 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We show the first evidence for locally excited chorus at frequencies below 0.1 f ce (electron cyclotron frequency) in the outer radiation belt. A statistical study of chorus during geomagnetic storms observed by the Van Allen Probes found that frequencies are often dramatically lower than expected. The frequency at peak power suddenly stops tracking the equatorial 0.5 f ce and f / f ce decreases rapidly, often to frequencies well below 0.1 f ce (in situ and mapped to equator). These very low frequency waves are observed both when the satellites are close to the equatorial plane and at higher magnetic latitudes. Poynting flux is consistent with generation at the equator. Wave amplitudes can be up to 20 to 40 mV/m and 2 to 4 nT. We conclude that conditions during moderate to large storms can excite unusually low frequency chorus, which is resonant with more energetic electrons than typical chorus, with critical implications for understanding radiation belt evolution. Chorus can be locally excited below 0.1 fce down to flh in outer radiation belt Frequency rapidly decreases below usual values, thus resonating with more energetic electrons Usually seen near minimum in Dst with implications for radiation belt evolution Nutzungsrecht: © 2015. The Authors. chorus outer radiation belt Lightning Jupiter Breneman, A. W oth Kletzing, C. A oth Wygant, J. R oth Kurth, W. S oth Thaller, S. A oth Enthalten in Geophysical research letters Washington, DC : Union, 1974 42(2015), 18, Seite 7273-7281 (DE-627)129095109 (DE-600)7403-2 (DE-576)01443122X 0094-8276 nnns volume:42 year:2015 number:18 pages:7273-7281 http://dx.doi.org/10.1002/2015GL065565 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2015GL065565/abstract http://search.proquest.com/docview/1722618749 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_47 GBV_ILN_62 GBV_ILN_154 GBV_ILN_601 GBV_ILN_2279 38.70 AVZ AR 42 2015 18 7273-7281 |
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10.1002/2015GL065565 doi PQ20160211 (DE-627)OLC1969325925 (DE-599)GBVOLC1969325925 (PRQ)p1836-1bf027462747a288ac0a98b9e9a7a5e05345a135d10cbd1051e904e110e7798a0 (KEY)0026932820150000042001807273vanallenprobesobservationsofunusuallylowfrequencyw DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Cattell, C. A verfasserin aut Van Allen Probes observations of unusually low frequency whistler mode waves observed in association with moderate magnetic storms: Statistical study 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We show the first evidence for locally excited chorus at frequencies below 0.1 f ce (electron cyclotron frequency) in the outer radiation belt. A statistical study of chorus during geomagnetic storms observed by the Van Allen Probes found that frequencies are often dramatically lower than expected. The frequency at peak power suddenly stops tracking the equatorial 0.5 f ce and f / f ce decreases rapidly, often to frequencies well below 0.1 f ce (in situ and mapped to equator). These very low frequency waves are observed both when the satellites are close to the equatorial plane and at higher magnetic latitudes. Poynting flux is consistent with generation at the equator. Wave amplitudes can be up to 20 to 40 mV/m and 2 to 4 nT. We conclude that conditions during moderate to large storms can excite unusually low frequency chorus, which is resonant with more energetic electrons than typical chorus, with critical implications for understanding radiation belt evolution. Chorus can be locally excited below 0.1 fce down to flh in outer radiation belt Frequency rapidly decreases below usual values, thus resonating with more energetic electrons Usually seen near minimum in Dst with implications for radiation belt evolution Nutzungsrecht: © 2015. The Authors. chorus outer radiation belt Lightning Jupiter Breneman, A. W oth Kletzing, C. A oth Wygant, J. R oth Kurth, W. S oth Thaller, S. A oth Enthalten in Geophysical research letters Washington, DC : Union, 1974 42(2015), 18, Seite 7273-7281 (DE-627)129095109 (DE-600)7403-2 (DE-576)01443122X 0094-8276 nnns volume:42 year:2015 number:18 pages:7273-7281 http://dx.doi.org/10.1002/2015GL065565 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2015GL065565/abstract http://search.proquest.com/docview/1722618749 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_47 GBV_ILN_62 GBV_ILN_154 GBV_ILN_601 GBV_ILN_2279 38.70 AVZ AR 42 2015 18 7273-7281 |
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10.1002/2015GL065565 doi PQ20160211 (DE-627)OLC1969325925 (DE-599)GBVOLC1969325925 (PRQ)p1836-1bf027462747a288ac0a98b9e9a7a5e05345a135d10cbd1051e904e110e7798a0 (KEY)0026932820150000042001807273vanallenprobesobservationsofunusuallylowfrequencyw DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Cattell, C. A verfasserin aut Van Allen Probes observations of unusually low frequency whistler mode waves observed in association with moderate magnetic storms: Statistical study 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We show the first evidence for locally excited chorus at frequencies below 0.1 f ce (electron cyclotron frequency) in the outer radiation belt. A statistical study of chorus during geomagnetic storms observed by the Van Allen Probes found that frequencies are often dramatically lower than expected. The frequency at peak power suddenly stops tracking the equatorial 0.5 f ce and f / f ce decreases rapidly, often to frequencies well below 0.1 f ce (in situ and mapped to equator). These very low frequency waves are observed both when the satellites are close to the equatorial plane and at higher magnetic latitudes. Poynting flux is consistent with generation at the equator. Wave amplitudes can be up to 20 to 40 mV/m and 2 to 4 nT. We conclude that conditions during moderate to large storms can excite unusually low frequency chorus, which is resonant with more energetic electrons than typical chorus, with critical implications for understanding radiation belt evolution. Chorus can be locally excited below 0.1 fce down to flh in outer radiation belt Frequency rapidly decreases below usual values, thus resonating with more energetic electrons Usually seen near minimum in Dst with implications for radiation belt evolution Nutzungsrecht: © 2015. The Authors. chorus outer radiation belt Lightning Jupiter Breneman, A. W oth Kletzing, C. A oth Wygant, J. R oth Kurth, W. S oth Thaller, S. A oth Enthalten in Geophysical research letters Washington, DC : Union, 1974 42(2015), 18, Seite 7273-7281 (DE-627)129095109 (DE-600)7403-2 (DE-576)01443122X 0094-8276 nnns volume:42 year:2015 number:18 pages:7273-7281 http://dx.doi.org/10.1002/2015GL065565 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2015GL065565/abstract http://search.proquest.com/docview/1722618749 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_47 GBV_ILN_62 GBV_ILN_154 GBV_ILN_601 GBV_ILN_2279 38.70 AVZ AR 42 2015 18 7273-7281 |
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Van Allen Probes observations of unusually low frequency whistler mode waves observed in association with moderate magnetic storms: Statistical study |
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Van Allen Probes observations of unusually low frequency whistler mode waves observed in association with moderate magnetic storms: Statistical study |
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van allen probes observations of unusually low frequency whistler mode waves observed in association with moderate magnetic storms: statistical study |
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Van Allen Probes observations of unusually low frequency whistler mode waves observed in association with moderate magnetic storms: Statistical study |
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We show the first evidence for locally excited chorus at frequencies below 0.1 f ce (electron cyclotron frequency) in the outer radiation belt. A statistical study of chorus during geomagnetic storms observed by the Van Allen Probes found that frequencies are often dramatically lower than expected. The frequency at peak power suddenly stops tracking the equatorial 0.5 f ce and f / f ce decreases rapidly, often to frequencies well below 0.1 f ce (in situ and mapped to equator). These very low frequency waves are observed both when the satellites are close to the equatorial plane and at higher magnetic latitudes. Poynting flux is consistent with generation at the equator. Wave amplitudes can be up to 20 to 40 mV/m and 2 to 4 nT. We conclude that conditions during moderate to large storms can excite unusually low frequency chorus, which is resonant with more energetic electrons than typical chorus, with critical implications for understanding radiation belt evolution. Chorus can be locally excited below 0.1 fce down to flh in outer radiation belt Frequency rapidly decreases below usual values, thus resonating with more energetic electrons Usually seen near minimum in Dst with implications for radiation belt evolution |
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We show the first evidence for locally excited chorus at frequencies below 0.1 f ce (electron cyclotron frequency) in the outer radiation belt. A statistical study of chorus during geomagnetic storms observed by the Van Allen Probes found that frequencies are often dramatically lower than expected. The frequency at peak power suddenly stops tracking the equatorial 0.5 f ce and f / f ce decreases rapidly, often to frequencies well below 0.1 f ce (in situ and mapped to equator). These very low frequency waves are observed both when the satellites are close to the equatorial plane and at higher magnetic latitudes. Poynting flux is consistent with generation at the equator. Wave amplitudes can be up to 20 to 40 mV/m and 2 to 4 nT. We conclude that conditions during moderate to large storms can excite unusually low frequency chorus, which is resonant with more energetic electrons than typical chorus, with critical implications for understanding radiation belt evolution. Chorus can be locally excited below 0.1 fce down to flh in outer radiation belt Frequency rapidly decreases below usual values, thus resonating with more energetic electrons Usually seen near minimum in Dst with implications for radiation belt evolution |
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We show the first evidence for locally excited chorus at frequencies below 0.1 f ce (electron cyclotron frequency) in the outer radiation belt. A statistical study of chorus during geomagnetic storms observed by the Van Allen Probes found that frequencies are often dramatically lower than expected. The frequency at peak power suddenly stops tracking the equatorial 0.5 f ce and f / f ce decreases rapidly, often to frequencies well below 0.1 f ce (in situ and mapped to equator). These very low frequency waves are observed both when the satellites are close to the equatorial plane and at higher magnetic latitudes. Poynting flux is consistent with generation at the equator. Wave amplitudes can be up to 20 to 40 mV/m and 2 to 4 nT. We conclude that conditions during moderate to large storms can excite unusually low frequency chorus, which is resonant with more energetic electrons than typical chorus, with critical implications for understanding radiation belt evolution. Chorus can be locally excited below 0.1 fce down to flh in outer radiation belt Frequency rapidly decreases below usual values, thus resonating with more energetic electrons Usually seen near minimum in Dst with implications for radiation belt evolution |
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Van Allen Probes observations of unusually low frequency whistler mode waves observed in association with moderate magnetic storms: Statistical study |
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