Results 61 to 70 of about 4,955 (149)

Extreme Radiation Belt Dropout During the May 2024 Superstorm

AGU Advances, Volume 7, Issue 6, September 2026.
Abstract The geomagnetic superstorm in May 2024 represents the most extreme space weather event over the past two decades, offering a unique opportunity to investigate radiation belt electron dynamics under exceptionally strong solar wind driving conditions. Observations from the Arase satellite show that relativistic electron fluxes dropped by several
Xingzhi Lyu, Dedong Wang, Bernhard Haas, Miroslav Hanzelka, Yixin Sun, Zikang Xie, Alwin Roy, Yoshizumi Miyoshi, Yihua Zheng, Christos Katsavrias, Sigiava Aminalragia‐Giamini, Nana Higashio, Takefumi Mitani, Takeshi Takashima, Iku Shinohara, Yoshiya Kasahara, Shoya Matsuda, Atsuki Shinbori, Fuminori Tsuchiya, Atsushi Kumamoto, Ayako Matsuoka, Mariko Teramoto, Kazuhiro Yamamoto, Yuri Y. Shprits   +23 more
wiley   +1 more source

Simultaneous ionospheric and magnetospheric observations of azimuthally propagating transient features during substorms [PDF]

, 1998
International audienceDuring the 6th August 1995, the CUTLASS Finland HF radar ran in a high time resolution mode, allowing measurements of line-of-sight convection velocities along a single beam with a temporal resolution of 14 s.
Tim K. Yeoman (7583066), Mukai, T., Yamamoto, T., T. K. Yeoman, T. Mukai, T. Yamamoto, T. Mukai (7612310), T. Yamamoto (3689515), Yeoman, T. K., Yeoman, T.K.   +9 more
core   +4 more sources

First Observational Results of the Neutral Gas Mass Spectrometer Onboard the China's TianMu‐1 Constellation

Earth and Space Science, Volume 13, Issue 9, September 2026.
Abstract In situ observations of thermospheric composition have long been scarce, limiting our understanding of the upper atmosphere and its response to space weather. This study focuses on the Neutral Gas Mass Spectrometer (NGMS) onboard the TM19 and TM20 satellites of China's TianMu‐1 constellation, presenting the first systematic elaboration of its ...
Jiangzhao Ai, Yongping Li, Xianguo Zhang, Yueqiang Sun, Hong Zeng, Weihua Bai, Hongbo Wang, Xiaoliang Zheng, Jia Li, Yujie Wang, Yuanyuan Cao, Xinchun Tang   +11 more
wiley   +1 more source

Statistical Scale Analyses of a Diurnal Periodicity in Auroral Kilometric Radiation, Observed by Wind/WAVES

Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.
Abstract The Earth's strongest natural radio emission is Auroral Kilometric Radiation (AKR), which is correlated with auroral intensity, and is a barometer for space weather. AKR is generated by the electron cyclotron maser instability, with sources on auroral field lines. Previous work on AKR and radio emissions from other planets (or stars) points to
Alexandra Ruth Fogg, S. Wu, C. M. Jackman, S. J. Walker, M. J. Rutala, C. K. Louis, S. M. Ivanov, L. Lamy, J. E. Waters, D. K. Whiter   +9 more
wiley   +1 more source

Impacts of Neutral Wind‐Driven Currents on Geomagnetic Disturbances and Magnetospheric Dynamics During the May 2024 Storm

Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.
Abstract The neutral wind dynamo generates ionospheric currents that can significantly affect high‐latitude electrodynamics during geomagnetic storms, yet its role in global magnetosphere‐ionosphere coupling is often underrepresented. We quantify the impact of wind‐driven currents on geomagnetic disturbances (GMDs) and magnetospheric dynamics during ...
Yu Hong, Yue Deng, Cheng Sheng, Daniel Welling, Colin Waters   +4 more
wiley   +1 more source

Parameterization of the Latitudinal Dependence of ULF Waves in the Magnetosphere via Long‐Term Statistical Observations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.
Abstract Ultra‐low frequency (ULF) waves are crucial drivers of energetic electron radial diffusion in Earth's radiation belts. However, present radial diffusion coefficients are predominantly derived for equatorially mirroring electrons, relying on ULF wave power models from near‐equatorial spacecraft.
G. A. Riggs, W. Tu, T. Sarris
wiley   +1 more source

Power grid disturbances and polar cap index during geomagnetic storms

Journal of Space Weather and Space Climate, 2013
The strong geomagnetic storm in the evening of 30 October 2003 caused high-voltage power grid disturbances in Sweden that expanded to produce hour-long power line outage in Malmö located in the southern part of the country.
Stauning Peter
doaj   +1 more source

Space weather with an arc’s ∼2 h trip across the nightside polar cap

Frontiers in Astronomy and Space Sciences
Flow channels can extend across the polar cap from the dayside to the nightside auroral oval, where they lead to localized reconnection and auroral oval disturbances.
Larry R. Lyons, Yukitoshi Nishimura, Jiang Liu, Jiang Liu, Sneha Yadav, Ying Zou, William A. Bristow, Eric Donovan, Nozomu Nishitani   +8 more
doaj   +1 more source

Vertical evolution of auroral acceleration at substorm onset [PDF]

, 2009
This study describes the onset process of auroral substorms in connection with the vertical evolution of auroral particle acceleration, on the basis of auroral kilometric radiation (AKR) dynamics.
Morioka, A., A. Morioka, R. R. Anderson, Misawa, H., Anderson, R.R., J. D. Menietti, Honary, F., F. Tsuchiya, Tsuchiya, F., Miyoshi, Y., Parks, G.K., Menietti, J.D., H. Misawa, G. K. Parks, Y. Miyoshi, Yumoto, K., F. Honary, K. Yumoto   +17 more
core   +2 more sources

Titan’s influence on Saturnian substorm occurrence

Geophysical Research Letters, 2008
Substorms play an important role in the energization and transport of plasmas in planetary magnetospheres, including the shedding of the mass added by moons in the case of Jupiter and Saturn.
C. T. Russell, C. M. Jackman, H. Y. Wei, C. Bertucci, M. K. Dougherty   +4 more
doaj   +1 more source