Results 41 to 50 of about 2,664 (215)

Vertical Characteristics of Travelling Ionospheric Disturbances [PDF]

Australian Journal of Physics, 1960
The vertical dimensions of travelling disturbance phenomena have been investigated by derivation of the associated true height distributions of ion density. The height at which they appear often has an upper limit which may fluctuate in height from day to day.
openaire   +1 more source

Large‐Scale Magnetosheath Jets Formed by Shock‐Discontinuity Interactions: A Three‐Dimensional Global Hybrid Simulation

Geophysical Research Letters, Volume 53, Issue 9, 16 May 2026.
Abstract Magnetosheath high‐speed jets with enhanced dynamic pressure are common in Earth's magnetosheath and can impinge on the magnetopause, driving pronounced boundary deformation. Recent observations indicate that shock–discontinuity interactions (SDIs) can generate magnetosheath jets, but the formation mechanism is still unclear.
Jin Guo, San Lu, Quanming Lu, Yufei Zhou, Boyi Wang, Tianran Sun, Yihong Guo, Zhongwei Yang, Shimou Wang, Junyi Ren, Jiuqi Ma, Chao Shen, Xinliang Gao, Rongsheng Wang   +13 more
wiley   +1 more source

Origin of the Ionospheric Changes Immediately Before the 15 January 2022 Eruption of the Hunga-Tonga Hunga-Ha’apai Submarine Volcano

Atmosphere
Near-field ionospheric total electron content records before and after the 15 January 2022 eruption of the Hunga-Tonga Hunga-Ha’apai submarine volcano were studied using GNSS total electron content data.
Kosuke Heki
doaj   +1 more source

On the Ionospheric Disturbances in New Zealand and Australia Following the Eruption of the Hunga Tonga‐Hunga Ha'apai Volcano on 15 January 2022

Space Weather, 2023
The Hunga Tonga‐Hunga Ha'apai (hereafter HTHH) submarine volcano erupted at 04:14:45 UT on 15 January 2022, causing ionospheric disturbances. This paper uses carrier phase observations from GNSS tracking stations in New Zealand and Australia to calculate
Peng Chen, Mingzhu Xiong, Rong Wang, Yibin Yao, Fucai Tang, Hao Chen, Liangcai Qiu   +6 more
doaj   +1 more source

Solar Wind‐Magnetosphere‐Ionosphere Coupling During the October 2024 Storms

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract Two geomagnetic storms occurred in October 2024 (Oct 6‐9 and 10–12), driven by the impact of a series of interplanetary coronal mass ejections on the magnetosphere. The first was a moderate storm, with peak Sym‐H near −150 nT, whereas the second was intense, Sym‐H reaching −340 nT.
S. E. Milan, M. K. Mooney, G. E. Bower, R. M. Hodnett, U. V. Amerstorfer, C. Möstl, A. Samsonov, B. J. Anderson, J. Gjerloev, S. K. Vines   +9 more
wiley   +1 more source

ESTIMATED INFLUENCE OF STRATOSPHERIC ACTIVITY ON THE IONOSPHERE ACCORDING TO MEASUREMENTS WITH ISTP SB RAS TOOLS

Solar-Terrestrial Physics, 2021
We present the results of a comprehensive study of the manifestation of wave activity with periods of internal gravity waves (IGW) in various regions of the atmosphere: in the stratosphere, upper mesosphere, and in the F2-region of the ionosphere.
M.V. Tolstikov, K.G. Ratovsky, I.V. Medvedeva, D.S. Khabituev   +3 more
doaj   +1 more source

Medium-scale traveling ionospheric disturbances by three-dimensional ionospheric GPS tomography [PDF]

Earth, Planets and Space, 2016
In this study, we develop a three-dimensional ionospheric tomography with the ground-based global position system (GPS) total electron content observations. Because of the geometric limitation of GPS observation path, it is difficult to solve the ill-posed inverse problem for the ionospheric electron density.
Chen, C. H., Saito, A., Lin, C. H., Yamamoto, M., Suzuki, S., Seemala, G. K.   +5 more
openaire   +1 more source

Modeling the Detectability of Energetic Heliospheric Ions at Pluto During the New Horizons Flyby

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract We investigate the detectability of heliospheric helium ions at energies up to 100 keV by the New Horizons (NH) spacecraft during its flyby through Pluto's induced magnetosphere. The Pluto Energetic Particle Spectrometer Science Investigation energetic ion detector observed a reduction in their flux by an order of magnitude as the spacecraft ...
Randall T. Ruch, Sven Simon, Peter Kollmann, C. Michael Haynes   +3 more
wiley   +1 more source

Investigation of Acoustic Waves in the Ionosphere Generated by a Deep Convection System Using Distributed Networks of GPS Receivers and Numerical Modeling

Geophysical Research Letters, 2018
Acoustic waves generated in the lower atmosphere may become an important source of variability in the upper atmosphere. Although excited with small amplitudes compared to gravity waves, they are minimally subjected to viscous dissipation and may reach ...
Irfan Azeem, Richard L. Walterscheid, Geoff Crowley   +2 more
doaj   +1 more source

Ionospheric response to magnetar flare: signature of SGR J1550–5418 on coherent ionospheric Doppler radar [PDF]

Annales Geophysicae, 2017
This paper presents observational evidence of frequent ionospheric perturbations caused by the magnetar flare of the source SGR J1550–5418, which took place on 22 January 2009.
A. Mahrous
doaj   +1 more source