Results 121 to 130 of about 7,951 (302)

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

Neural network prediction of geomagnetic activity: a method using local Hölder exponents

, 2002
Local scaling and singularity properties of solar wind and geomagnetic time series were analysed using Hölder exponents . It was shown that in analysed cases due to the multifractality of fluctuations, α changes from point to point.
D. Jankovičová, Vörös, Z., Z. Vörös, Jankovi?ová, D.   +3 more
core  

The statistical dependence of auroral absorption on geomagnetic and solar wind parameters [PDF]

, 2004
Data from the Imaging Riometer for Ionospheric Studies (IRIS) at Kilpisjärvi, Finland, have been compiled to form statistics of auroral absorption based on seven years of observations.
A. Senior, I. W. McCrea, Honary, F., Senior, A., S. R. Marple, Kavanagh, A. J., Kosch, M. J., A. J. Kavanagh, M. J. Kosch, Marple, S. R., McCrea, I. W., F. Honary, E. E. Woodfield, Woodfield, E. E.   +13 more
core   +1 more source

Atmospheric Tides Imprint a Wavenumber‐4 Structure in Topside Ionospheric ELF Wave Intensity

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract Atmospheric tides produce a well known pronounced longitudinal wavenumber‐4 (WN‐4) structure in the ionosphere, but their influence on electromagnetic‐wave propagation through the ionosphere remains poorly constrained. Here we use DEMETER satellite measurements to show that the extremely low frequency (ELF) electric field in the low‐latitude ...
Li Liao, Shufan Zhao, Maosheng He, Yatong Cui, Jinlei Li   +4 more
wiley   +1 more source

Expedition 306 summary

, 2006
The overall aim of the North Atlantic paleoceanography study of Integrated Ocean Drilling Program Expedition 306 is to place late Neogene–Quaternary climate proxies in the North Atlantic into a chronology based on a combination of geomagnetic ...
Hagino, Kyoko, Higgins, Sean M., Kulhanek, Denise K., Aboud, Essam, Evans, Helen, Akimoto, Kazumi, Harris, Robert, Nanayama, Futoshi, Bjørklund, Kjell R., Hatakeda, Kentaro, Guyodo, Yohan J.B., Gruetzner, Jens, Kanamatsu, Toshiya, Nielsen, Simon H.H., Rashid, Harunur, Stein, Ruediger, Hefter, Jens Norbert, Voelker, Antje, Bailey, Ian, Zhai, Qiumin, Ohno, Masao, Fang, Nianqiao, Sierro Sanchez, Francisco J., Judge, Shelley A., Alvarez Zarikian, Carlos A., Acton, Gary D., Ferretti, Patrizia   +26 more
core   +1 more source

Low Abundances of Ultramafic Components in the Chang'e‐6 Landing Site Basalt and Ejecta Material

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract The South Pole‐Aitken (SPA) Basin, the Moon's largest impact structure, holds key insights into lunar evolution, prompting the Chang'e‐6 mission to return first samples for ground‐truth verification. Analysis of over 6,000 grains from the Chang'e‐6 soil returned from the SPA Basin reveals a composition dominated by clinopyroxene (26.5–32.9 vol.
Zhenbing She, Zaicong Wang, Tianyang Li, Hao Zhang, Qi He, Yiheng Li, Antong Gao, Yi Gu, Zichen Wei, Yan Zhuang, Changhao Ni, Shuang Shi, Jiawei Li, Jiawei Zhao, Wen Zhang, Jiaqi Zheng, Xu Chen, Keqing Zong, Zhaochu Hu, Xiang Wu, Long Xiao   +20 more
wiley   +1 more source

Geomagnetic ground survey in Slovakia for the 2007.5 epoch

Contributions to Geophysics and Geodesy, 2009
New  geomagnetic ground  survey  was  carried  out in  years  2006–2008.   The survey  was accomplished under  fair geomagnetic-activity conditions during  the minimum phase  of a solar  activity  cycle No. 23.  The  measurements  of the geomagnetic field
Peter DOLINSKÝ, Fridrich VALACH, Magdaléna VÁCZYOVÁ, Milan HVOŽDARA   +3 more
doaj  

The CHAOS-7 geomagnetic field model and observed changes in the South Atlantic Anomaly. [PDF]

Earth Planets Space, 2020
Finlay CC, Kloss C, Olsen N, Hammer MD, Tøffner-Clausen L, Grayver A, Kuvshinov A.   +6 more
europepmc   +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 regional modelling of the main geomagnetic field [PDF]

Geofizika, 2007
In this study I applied Spherical Cap Harmonic Analyses, SCHA, with physical regularization (Korte and Holme, 2003) to synthetic series obtained from the Comprehensive model CM4 (Sabaka et al., 2004), at 46 European observatory locations and additionally 11 'virtual observatories' chosen to improve the initial data distribution. The main purpose was to
openaire   +1 more source