Results 71 to 80 of about 8,280 (207)

MMS Observation of Trapping of Electrons by Chorus Waves Inside a Magnetic Hole

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract We present an event of chorus waves embedded within a magnetic hole (MH) in the Earth's magnetosheath, observed by the Magnetospheric Multi‐Scale (MMS) mission on 1 March 2016. Unlike conventional cases where chorus waves are typically detected near the center of a magnetic depression, in this event lower‐band chorus waves appear predominantly
Krushna C. Barik, Yoshiharu Omura, Satyavir Singh   +2 more
wiley   +1 more source

Simultaneous Observations of Electron Phase Space Density Variations in the Geostationary Orbit by GK2A, GOES‐16, and GOES‐17

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract This study presents simultaneous measurements of electron phase space density (PSD) gradients in geostationary orbit using data from GK2A, GOES‐16, and GOES‐17. By leveraging a three‐satellite configuration, we provide statistical results of PSD gradient estimation in invariant coordinates.
N.‐Y. Lee, J. Seon, G. W. Na, C.‐H. Lee, W.‐H. Seol, K.‐C. Kim   +5 more
wiley   +1 more source

Are Storm-Time Substorms Triggered or Spontaneous? [PDF]

Journal of Astronomy and Space Sciences, 2004
Magnetic storms are almost always accompanied with substorms or substorm-like disturbances. Understanding the nature of the storm-time substorm is important for the currently critical issue of the storm-substorm relation.
D.Y. Lee, H. J. Kim, C. R. Choi
doaj   +1 more source

Frequency Extensions of Auroral Kilometric Radiation: The Key to Unlocking Earth's Radio Response to Substorms

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Auroral kilometric radiation (AKR) provides a sensitive probe of magnetospheric dynamics during substorms. We analyze an extended data set of AKR bursts observed by the WIND spacecraft to investigate how the frequency structure of AKR responds to substorm onset and evolution.
Simon James Walker, Caitríona M. Jackman, Alexandra R. Fogg, Siyuan Wu, James E. Waters   +4 more
wiley   +1 more source

Solar wind-magnetosphere coupling and the distant magnetotail: ISEE-3 observations [PDF]

, 1985
ISEE-3 Geotail observations are used to investigate the relationship between the interplanetary magnetic field, substorm activity, and the distant magnetotail.
Akasofu, S. I., Baker, D. N., Lepping, R. P., Sibeck, D. G., Slavin, J. A., Smith, E. J., Zwickl, R. D.   +6 more
core   +1 more source

Formation of Continuum Emission Structures Associated With the Aurora

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Recent observations enabled by improvements in geospace remote‐sensing instrumentation have revealed the spatial structure of continuum emissions that appear to be associated with the aurora, but little is known about the formation and drivers of these structures.
J. Houghton, E. Spanswick, J. Liang, B. Gallardo‐Lacourt   +3 more
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

Evaluating the OMNI Database: Statistical Analysis of Time‐Shifted L1 Data Versus Direct Near‐Earth Solar Wind Observations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract This study presents a comprehensive statistical comparison of solar wind measurements between the OMNI database which contains data collected at L1 that is shifted to the bow shock nose, and near‐Earth observations from MMS, Cluster, and THEMIS missions near the bow shock nose.
G. H. Blüthner, M. Volwerk, D. Schmid, R. Nakamura, M. Temmer, O. W. Roberts, F. Koller, A. Varsani   +7 more
wiley   +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

Simultaneous measurements of magnetotail dynamics by IMP spacecraft [PDF]

Changes in tail energy density during substorms in the magnetotail are given. In addition to plasma sheet thinnings seen prior to substorm onsets, a gradual decrease in plasma beta was detected in the deep tail which precedes onset and the more prominent
Asbridge, J. R., Bame, S. J., Fairfield, D. H., Hones, E. W., Jr., Lepping, R. P.   +4 more
core   +1 more source