Results 121 to 130 of about 13,189 (224)

The Non‐Linear Dependence of Daily Maximum Ionospheric Total Electron Content on F10.7

Space Weather, Volume 24, Issue 2, February 2026.
Abstract Daily 10.7 cm solar flux, the F10.7 index, is a key parameter for the ionospheric state. Global maps of ionospheric Total Electron Content (TEC) offer almost continuous multidecadal coverage. We find that the global daily maximum of TEC saturates with daily F10.7.
M. A. Cafolla, S. C. Chapman, N. W. Watkins, O. P. Verkhoglyadova   +3 more
wiley   +1 more source

Meridional currents during equatorial geomagnetic disturbances

Geophysical Research Letters, 1993
The annual average solar daily variations of the eastward component of the geomagnetic field, Y, at the equatorial stations, Kodaikanal and Huancayo indicate an increase on disturbed than on quiet days. With increasing daily mean geomagnetic activity index Ci, there is a systematic increase of daily mean value of Y and the systematic decrease of the ...
openaire   +1 more source

Low Frequency Oscillation Observed in the Ionosphere Around the Substorm Onsets

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract Three substorm events in which Defense Meteorological Satellite Program (DMSP) spacecraft are geomagnetically co‐located with substorm onset locations in IMAGE far ultraviolet auroral images are analyzed. A Hilbert‐Huang Transform is used to decompose the DMSP B⊥ ${B}_{\perp }$ in the ionosphere to its intrinsic mode functions. A dominant mode
Simon Wing, Jay R. Johnson, Elmer C. Rivera, Arthur J. Hull, Peter Damiano   +4 more
wiley   +1 more source

A hybrid wavelet-wiener noise reduction algorithm for geomagnetic signals in dynamic positioning

Alexandria Engineering Journal
Indoor positioning technology is a hotspot in current research, and geomagnetic combined positioning is one of the mainstream directions. Currently, indoor or underground positioning techniques are all passive positioning such as RFID, UWB, WIFI and ...
Mingduo Li, Jinhua Wang, Liwen Guo, Qinggang Meng, Mengqian Li, Jinliang Hou, Aoze Duan, Haotian Sun   +7 more
doaj   +1 more source

Decadal‐Scale In Situ Scanning of a Stalagmite From Southwest China Reveals Blake Geomagnetic Excursion Structure

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract We present a decadal‐scale paleomagnetic analysis of a stalagmite collected from Shuixi Cave, southwest China, spanning 89−123 ka. Our findings include: (a) Magnetite is the dominant magnetic mineral, and paleomagnetic directions can be obtained via demagnetization; (b) Magnetic scanning at 0.1‐mm resolution captures key magnetic features ...
Zhongshan Shen, Youwei Li, Liang Yi, Huafeng Qin, Jian Wang, Yibing Li, Hai Cheng   +6 more
wiley   +1 more source

Wavelet Analyses of Geomagnetic Data regarding Major Geomagnetic Disturbances

Journal of Environmental Science and Engineering B, 2021
null Laurentiu Asimopolos, null Natalia-Silvia Asimopolos, null Adrian Aristide Asimopolos   +2 more
openaire   +1 more source

Ionospheric Variations Associated, with Geomagnetic Disturbances

Journal of geomagnetism and geoelectricity, 1953
Variations in the densities and heights of the ionospheric Es and F2 regions during magnetic storms are studied. At the moderate latitudes in summer solstice and at the equatorial zone, the disturbance variation of the Es in both local time (SD) and storm time (Dst) is obtained by statistical examination, although the individual values of the Es data ...
openaire   +2 more sources

Plasma Conditions Govern the Reversible Transition Between STEVE and Picket Fence Emissions

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract On 6 May 2018, a remarkable subauroral optical event exhibiting three phases of evolution (Strong Thermal Emission Velocity Enhancement [STEVE] → Picket Fence → STEVE) and co‐occurrence with a stable auroral red arc was observed over Alberta, Canada.
Jinghan Wang, Jing Liu, Jun Liang, Shuhan Li   +3 more
wiley   +1 more source

Recurrent Coronal Mass Ejections and Their Geomagnetic Storms Association on 2012 January 19: Solar Surface to Upper Earth’s Atmosphere Analyses

The Astrophysical Journal
In this study, we have conducted an analysis of space weather disruptions that occurred on 19 January 2012. Our analysis identified three coronal mass ejections (CMEs), CME1, CME2, and CME3—which were ejected at 09:48:05 universal time (UT), 14:36:05 UT,
A. Hassanin, Amira Shimeis, Hadeer F. Sabeha, F. N. Minta   +3 more
doaj   +1 more source

Variation with interplanetary sector of the total magnetic field measured at the OGO 2, 4, and 6 satellites [PDF]

Variations in the scalar magnetic field (delta B) from the polar orbiting OGO 2, 4, and 6 spacecraft are examined as a function of altitude for times when the interplanetary magnetic field is toward the sun and for times when the interplanetary magnetic ...
Langel, R. A.
core   +1 more source