Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Inner Magnetospheric and Geomagnetic Responses to Solar Wind Driving During Omega Band Events. / Cribb, Viviane; Pulkkinen, T. I.; Kepko, Laurence; Gallardo-Lacourt, B.; Partamies, Noora; Вохмянин, Михаил Владимирович; Апатенков, Сергей Вячеславович.
в: Journal of Geophysical Research: Space Physics, Том 130, № 11, e2025JA033987, 01.11.2025.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Inner Magnetospheric and Geomagnetic Responses to Solar Wind Driving During Omega Band Events
AU - Cribb, Viviane
AU - Pulkkinen, T. I.
AU - Kepko, Laurence
AU - Gallardo-Lacourt, B.
AU - Partamies, Noora
AU - Вохмянин, Михаил Владимирович
AU - Апатенков, Сергей Вячеславович
PY - 2025/11/1
Y1 - 2025/11/1
N2 - Omega bands are mesoscale auroral structures that appear as quasi-periodic eastward drifting protrusions of the poleward edge of the diffuse aurora. Cribb et al. (2024), https://doi.org/10.1029/2024gl109756 demonstrated that the appearance of omega bands is associated with solar wind driving consistent with stream interaction regions. However, the formation of omega bands through physical processes in the magnetosphere and ionosphere is not well understood. We perform superposed epoch analyses of the solar wind, magnetospheric, and geomagnetic parameters during 205 omega band events from 1997 to 2007. We find that the large majority of omega bands are associated with CME- or SIR-like solar wind driving. In the ionosphere, omega bands are correlated with sustained periods of activity as defined by the auroral electrojets. In the inner magnetosphere, the appearance of omega bands is associated with an activation of a global current system enhanced relative to typical substorm activity. Our findings suggest omega band formation is associated with an enhanced partial ring current or substorm current wedge.
AB - Omega bands are mesoscale auroral structures that appear as quasi-periodic eastward drifting protrusions of the poleward edge of the diffuse aurora. Cribb et al. (2024), https://doi.org/10.1029/2024gl109756 demonstrated that the appearance of omega bands is associated with solar wind driving consistent with stream interaction regions. However, the formation of omega bands through physical processes in the magnetosphere and ionosphere is not well understood. We perform superposed epoch analyses of the solar wind, magnetospheric, and geomagnetic parameters during 205 omega band events from 1997 to 2007. We find that the large majority of omega bands are associated with CME- or SIR-like solar wind driving. In the ionosphere, omega bands are correlated with sustained periods of activity as defined by the auroral electrojets. In the inner magnetosphere, the appearance of omega bands is associated with an activation of a global current system enhanced relative to typical substorm activity. Our findings suggest omega band formation is associated with an enhanced partial ring current or substorm current wedge.
KW - high speed flow
KW - magnetosphere-ionosphere coupling
KW - omega band
KW - solar wind driving
KW - stream interaction region
KW - substorm
UR - https://www.mendeley.com/catalogue/e075c952-e6c2-3818-9a56-a4457d76f018/
U2 - 10.1029/2025ja033987
DO - 10.1029/2025ja033987
M3 - Article
VL - 130
JO - Journal of Geophysical Research: Space Physics
JF - Journal of Geophysical Research: Space Physics
SN - 2169-9380
IS - 11
M1 - e2025JA033987
ER -
ID: 145086521