Results 51 to 60 of about 4,523 (241)

Mercury's magnetospheric substorm and storm

地球与行星物理论评, 2022
Magnetospheric substorms and magnetic storms are explosive energy storage and release processes occurring during the interactions between the solar wind and planetary magnetospheres. They are accompanied by complex plasma dynamics processes and they have
Jiutong Zhao, Weijie Sun, Qiugang Zong
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

Method to locate the polar cap boundary in the nightside ionosphere and application to a substorm event [PDF]

, 2006
International audienceIn this paper we describe a new method to be used for the polar cap boundary (PCB) determination in the nightside ionosphere by using the EISCAT Svalbard radar (ESR) field-aligned measurements by the 42-m antenna and southward ...
A. T. Aikio, O. Amm, Amm, Olaf, Aikio, A.T., Aikio, Anita T., Aikio, A. T., A. Kozlovsky, Kozlovsky, Alexander, Pitkänen, Timo, Pitkänen, T., Amm, O., Kozlovsky, A., T. Pitkänen   +12 more
core   +1 more source

Evolution of Energetic Proton Parallel Pressure Anisotropy at Geosynchronous Altitudes: Potential Role in Triggering Substorm Expansion Phase Onset

Geophysical Research Letters
The sequence of events associated with the triggering of energy release during substorm expansion phase onset is still not well‐understood. Oberhagemann and Mann (2020b, https://doi.org/10.1029/2019gl085271) proposed a new substorm onset mechanism, where
S. S. Babu, I. R. Mann, S. Dimitrakoudis, L. G. Ozeke, I. J. Rae, C. Forsyth, A. W. Smith   +6 more
doaj   +1 more source

Quantitative Evaluation of Energy Coupling between Quasi-Periodic Substorms and High-Speed Coronal Streams [PDF]

Journal of Astronomy and Space Sciences, 2008
It has been known that high-speed solar wind streams associated with coronal holes lead to quasi-periodic substorms that occur approximately every 2˜4 hours.
M. Y. Park, D.-Y. Lee, K. C. Kim, C. R. Choi, K. S. Park   +4 more
doaj   +1 more source

From physics of polar aurora to changes of the fundamental approaches to the physics of the magnetospheric processes

Frontiers in Astronomy and Space Sciences, 2022
One of the main problems of modern magnetospheric physics is the lack of a self-consistent explanation of the main physical processes based on the laws of plasma physics.
Elizaveta E. Antonova, Elizaveta E. Antonova   +1 more
doaj   +1 more source

Electron Scattering by Highly Oblique Quasi‐Electrostatic Chorus Waves Under Realistic Magnetospheric Conditions

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract Using Van Allen Probes data (2013–2015), we report that highly oblique chorus waves frequently occur in low‐density regions where fpe/fce≈3 ${f}_{\text{pe}}/{f}_{\text{ce}}\approx 3$. These waves exhibit an electric‐to‐magnetic energy ratio PE/c2PB>0.5 $\sqrt{{P}_{\mathrm{E}}/{c}^{2}{P}_{\mathrm{B}}} > 0.5$, much higher than the typical <0.1 ${
Lixian Yang, Si Liu, Zhonglei Gao, Wenya Li, Fuliang Xiao, Zhaoguo He, Xingran Chen, Yuyue Jin, Qian He, Zhoukun Deng, Jiawen Tang   +10 more
wiley   +1 more source

On the character and distribution of lower-frequency radio emissions at Saturn and their relationship to substorm-like events [PDF]

, 2009
With the arrival of the Cassini spacecraft at Saturn in July 2004, there have been quasi-continuous observations of Saturn kilometric radiation (SKR) emissions.
L. Lamy, M. P. Freeman, S. W. H. Cowley, Lamy, L., Cecconi, Baptiste, B. Cecconi, W. S. Kurth, Jackman, C.M., Freeman, M. P., Kurth, W.S., Zarka, P., C. M. Jackman, M. K. Dougherty, Lamy, Laurent, Freeman, M.P., P. Zarka, Jackman, Caitriona M., Cowley, S.W.H., Cecconi, B., Kurth, William S., Dougherty, M.K., Cowley, S. W. H., Dougherty, Michele K., Freeman, Mervyn P., Zarka, Philippe   +24 more
core   +1 more source

The Shock‐Substorm of 24 September 1998: A Different Type of Substorm Trigger Onset

Geophysical Research Letters
An interplanetary shock triggered a substorm with a peak intensity SML = −1,781 nT on 24 September 1998. This is called a shock‐substorm here to differentiate it from generic substorms.
Bruce T. Tsurutani, Rajkumar Hajra, Yusuke Ebihara, Gurbax S. Lakhina, Yasuhito Narita, Karl‐Heinz Glassmeier   +5 more
doaj   +1 more source

Substorm detonation [PDF]

Journal of Geophysical Research: Space Physics, 1999
The rapid, Alfvénic timescale of “onset” has been an enigma ever since magnetospheric substorms were first identified. Investigators have proposed a variety of trigger mechanisms in an effort to account for the abrupt reconfiguration observed. No one mechanism clearly stands out as the single cause of substorms.
openaire   +1 more source