Results 51 to 60 of about 4,372 (239)

Magnetotail reconnection onset caused by electron kinetics with a strong external driver

Nature Communications, 2020
Magnetotail reconnection plays a crucial role in explosive energy conversion in geospace. Here, the authors show that magnetotail reconnection starts from electron reconnection in the presence of a strong external driver, which then develops into ion ...
San Lu, Rongsheng Wang, Quanming Lu, V. Angelopoulos, R. Nakamura, A. V. Artemyev, P. L. Pritchett, T. Z. Liu, X.-J. Zhang, W. Baumjohann, W. Gonzalez, A. C. Rager, R. B. Torbert, B. L. Giles, D. J. Gershman, C. T. Russell, R. J. Strangeway, Y. Qi, R. E. Ergun, P.-A. Lindqvist, J. L. Burch, Shui Wang   +21 more
doaj   +1 more source

Observing the Earth's Plasmasphere and Ionosphere From the Lunar Surface

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract We present the analysis of the first lunar‐based observational characterization of the Earth's plasmasphere and ionosphere using Global Navigation Satellite Systems signals tracked from the lunar surface by the Lunar GNSS Receiver Experiment (LuGRE). The Earth‐Moon geometry enables limb sounding of the plasmasphere at altitudes exceeding 3,000 
C. Cesaroni, L. Spogli, M. Guerra, R. Ghidoni, V. Ventriglia, A. Minetto, A. Nardin, L. Alfonsi, F. Dovis   +8 more
wiley   +1 more source

Quantitative magnetotail characteristics of different magnetospheric states [PDF]

, 2004
International audienceQuantitative relationships allowing one to compute the lobe magnetic field, flaring angle and tail radius, and to evaluate magnetic flux based on solar wind/IMF parameters and spacecraft position are obtained for the middle ...
Shukhtina, M. A., M. A. Shukhtina, N. P. Dmitrieva, V. A. Sergeev, Dmitrieva, N. P., Sergeev, V. A.   +5 more
core   +1 more source

Occurrence of Flat‐Top Electron Velocity Distributions in Magnetotail Plasma Jets

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract Non‐Maxwellian electron velocity distributions (eVDFs) are ubiquitous in collisionless plasmas. For example, various types of non‐Maxwellian eVDFs exist in magnetic reconnection jets in the Earth's magnetotail. At thermal energies, eVDF can be flat‐topped due to electron trapping associated with magnetic reconnection.
L. Richard, Yu. V. Khotyaintsev, C. Norgren   +2 more
wiley   +1 more source

A multi-instrument view of tail reconnection at Saturn

, 2008
Three instances of tail reconnection events at Saturn involving the ejection of plasmoids downtail have been reported by Jackman et al. (2007) using data from Cassini’s magnetometer (MAG).
Jones, G.H, Jones, G., Arridge, C., Krupp, N., Arridge, C.S., Bunce, E.J., Jackman, C., Jones, G. H., Jackman, C. M., Jackman, C.M., Arridge, C. S., Russell, C. T., Mitchell, D.G., Mitchell, D., McAndrews, H.J, Russell, C., Russell, C.T., Coates, A., Coates, A.J., McAndrews, H. J., McAndrews, H., Mitchell, D. G., Coates, A. J., Dougherty, M. K., Dougherty, M., Dougherty, M.K., Bunce, E., Bunce, E. J., Achilleos, N.   +28 more
core   +1 more source

Association of Pi2 pulsations and pulsed reconnection: Ground and Cluster observations in the tail lobe at 16 RE [PDF]

, 2006
International audienceSimultaneous measurements from the Cluster spacecraft and several ground stations (SAMNET, IMAGE, Kakioka, Hermanus) provide evidence for an association of Pi2 pulsations and pulsed reconnection in the magnetotail.
Rème, H., H. U. Frey, H. Rème, I. Dandouras, Hasegawa, H., O. Amm, Lucek, E., Fujimoto, M., H. Hasegawa, Honary, F., Keiling, A., A. Keiling, Sergeev, V., V. Sergeev, Dandouras, I., F. Honary, E. Lucek, Frey, H. U., M. Fujimoto, V. S. Semenov, Amm, O., Semenov, V. S.   +21 more
core   +1 more source

Mercury's Alfvén Wing Current System Under Sub‐Alfvénic Solar Wind Conditions: Insights From Global MHD Simulations

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract Mercury's proximity to the Sun results in the lowest average Alfvénic Mach number in the upstream solar wind compared to any other planet. Under extreme conditions, the upstream Alfvén speed can exceed the solar wind speed, resulting in a sub‐Alfvénic interaction in which standing Alfvén wings form.
Charles F. Bowers, Xianzhe Jia
wiley   +1 more source

CUTLASS/IMAGE observations of high latitude convection features during substorms [PDF]

, 1997
International audienceThe CUTLASS Finland HF radar has been operational since February 1995. The radar frequently observes backscatter during the midnight sector from a latitude range 70?75° geographic, latitudes often associated with the polar cap ...
T.K Yeoman, T. K. Yeoman, H Lühr, H. Lühr (7615595), Lühr, H., H. Lühr, Yeoman, T. K., Yeoman, T.K., T. K. Yeoman (7601525)   +8 more
core   +1 more source

Response of Martian Tail Lobes to Heliospheric Current Sheet: Tianwen-1 and MAVEN Joint Observations

The Astrophysical Journal Letters
Martian magnetotail lobes, mainly formed by the draped interplanetary magnetic field extending downstream in the tailward direction, are largely controlled by the solar wind and respond sensitively to variations in upstream drivers.
Z. Z. Guo, H. S. Fu, H. P. Jin, Y. M. Wang, C. L. Shen, Z. Z. Chen, J. Wang, C. B. Fu, H. Fang, J. S. Shi, M. Zhao, A. H. Tian   +11 more
doaj   +1 more source

Energy Dependence of Energetic Electron Precipitation Rates Near the Foot of Electron Isotropy Boundary

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract We report a rare quiet‐time observation by NOAA‐18 spacecraft flying nearly along the electron isotropy boundary (IBe). Complemented by data from four nearby meridional IBe crossings of other POES spacecraft, this case study provides a novel quantitative information concerning the regular energy dependence of the loss‐cone filling ratio (Jprec/
V. A. Sergeev, A. R. Dibaeva, N. A. Stepanov, A. V. Artemyev, R. M. Millan, A. Y. Ukhorskiy   +5 more
wiley   +1 more source