Results 91 to 100 of about 4,523 (241)

F‐Region Neutral Wind Response to Multiscale Geomagnetic Forcing During the 27 March 2014 Substorm Event

Space Weather, Volume 24, Issue 6, June 2026.
Abstract Techniques developed in the past few years enable the derivation of multiscale ion convection and particle precipitation patterns from high‐resolution ground‐based observations, and it has been shown in previous studies that such multiscale geomagnetic forcing can contribute significantly to ionospheric and thermospheric disturbances.
Cheng Sheng, Yue Deng, William A. Bristow, Yukitoshi Nishimura, Larry R. Lyons, Mark G. Conde, Christine Gabrielse   +6 more
wiley   +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

Substorm Identification With the WINDMI Magnetosphere ‐ Ionosphere Nonlinear Physics Model

Space Weather
We investigate the applicability and performance of the plasma physics based WINDMI model to the analysis and identification of substorm onsets. There are several substorm onset criteria that have been developed into event lists, either from auroral ...
P. Adhya, E. Spencer, M. Kayode‐Adeoye
doaj   +1 more source

A Semi‐empirical Framework for Dst Prediction Based on Global MHD Simulation of Earth's Magnetosphere

Space Weather, Volume 24, Issue 6, June 2026.
Abstract This study develops a semi‐empirical framework for Dst index forecasting by integrating the PPMLR‐MHD model of Earth's magnetosphere with four established empirical models (Burton, UCB, AK2, and Wang). The framework partitions the physics: global magnetopause and tail currents are simulated by MHD, while the ring current contribution is ...
Jiawen Yue, Xiaocheng Guo, Yuxian Wang, Jianguang Guo, Weiguo Zong, Tian Mao, Chi Wang   +6 more
wiley   +1 more source

Simultaneous THEMIS observations in the near-tail portion of the inner and outer plasma sheet flux tubes at substorm onset [PDF]

, 2008
We analyzed the measurements made by two Time History of Events and Macroscale Interactions during Substorms (THEMIS) probes in ideal observational conditions (quiet background, near midnight, inside the substorm current wedge) during two distinct ...
Angelopoulos, V., Bonnell, J. W., Partamies, N., Honary, Farideh, Larson, D., Apatenkov, S. V., Sergeev, V. A., Kuznetsova, M., McFadden, J. P.   +8 more
core  

Formation and motion of a transpolar arc in response to dayside and nightside reconnection [PDF]

, 2005
peer reviewed[ 1] We trace the formation and subsequent motion of a transpolar arc in response to dayside and nightside reconnection. Both high- and low-latitude dayside reconnection are observed, as well as periods of substorm and nonsubstorm nightside ...
Hubert, Benoît, Hubert, B., Milan, S. E., B. Hubert (7590023), Steve E. Milan (7589666), Grocott, A., Adrian Grocott (7590026)   +6 more
core   +1 more source

High‐Latitude GPS Position Error During Substorms

Space Weather, Volume 24, Issue 6, June 2026.
Abstract Substorms produce rapid fluctuations in Global Navigation Satellite System (GNSS) signals, leading to degraded positioning performance at high latitudes. This study investigates the correlation of auroral structures on Global Positioning System (GPS) Precise Point Positioning (PPP) error during three substorm events with different strengths ...
Weixuan Liao, Yukitoshi Nishimura, Waqar Younas, Wen Li, Keith M. Groves, Eric F. Donovan, Vassilis Angelopoulos   +6 more
wiley   +1 more source

Energetic electron precipitation during sawtooth injections [PDF]

, 2007
International audienceWe present simultaneous riometer observations of cosmic noise absorption in the nightside and dawn-noon sectors during sawtooth particle injections during 18 April 2002.
Donovan, E. F., Reeves, G. D., Immel, T. J., T. J. Immel, Honary, F., Manninen, J., G. D. Reeves, Lu, G., Kavanagh, A. J., A. J. Kavanagh, F. Honary, J. Manninen, E. F. Donovan, G. Lu   +13 more
core   +1 more source

Ionospheric Characterization Over Iran Using Multi‐Frequency IMB HF Transmitters and Global WSPRNET Reception During the 12 November 2025 Geomagnetic Storm

Space Weather, Volume 24, Issue 6, June 2026.
Abstract The Ionospheric Monitoring Beacon network in Iran provides continuous, multi‐frequency high‐frequency (HF) transmissions using WSPRNET modulation, enabling global reception and near–real‐time monitoring of ionospheric propagation conditions.
A. Mahmoudian, Saba Hafizi Lotfabadi, Mohammad Azimi   +2 more
wiley   +1 more source

Observations of omega bands using an imaging riometer. [PDF]

, 2009
We present a case study of an omega band cur- rent system from 11 May 1998 using data from the Imaging Riometer for Ionospheric Studies (IRIS) in Finland. For the first time, images of a substorm-related omega band in cos- mic noise absorption are shown.
Wild, J.A., Kavanagh, A.J., A. J. Kavanagh, F. Honary, Honary, F., J. A. Wild   +5 more
core   +1 more source