Height Profile Variations of Ionospheric Conductivity in Ethiopian Ionosphere During a Very Low Solar Activity

2021 ◽  
Author(s):  
Lake Endeshaw
Keyword(s):  
Solar Activity ◽  
Height Profile ◽  
Ionospheric Conductivity

scholarly journals Analysis of the Geomagnetic Component Z Daily Variation Amplitude Based on the China Geomagnetic Network

2020 ◽  
Author(s):  
Xudong Zhao ◽  
Yufei He ◽  
Qi Li ◽  
Xiaocan Liu
Keyword(s):  
Solar Activity ◽  
Yunnan Province ◽  
Daily Variation ◽  
Summer Solstice ◽  
Important Data ◽  
Ionospheric Conductivity ◽  
The Past ◽  
Daily Variations ◽  
Amplitude Increase ◽  
The Difference

Abstract. The daily variation amplitude of geomagnetic component Z is one of the important data products in Geomagnetic Network of China (GNC). It comes from the difference between maximum and minimum of the component Z recorded by the geomagnetic instrument in a day. Based on this data product, the daily variation amplitude of Z is analyzed in the past twelve years (2008–2019), including variation for each month in high and low solar activity years, seasonal variations and comparisons between the stations in Yunnan Province and in southeast China. The study indicates that the ionospheric conductivity mainly contributes to the Z daily variations amplitude in the same month or season changing along with solar activity. But the neutral wind in ionosphere could make the Z daily variations amplitude in equinox months equal to or greater than it in summer solstice months during some solar high activity years. Due to the complicated underground electrical structures in Yunnan province, the conductivity underground acts as an amplifier to make the Z daily variations amplitude increase by about 12 % ~ 41 % in Yunnan Province during equinox and summer solstice months.

Influence of Magnetic Fields on Solar Hydrodynamics: Experimental Results

1977 ◽  
Vol 36 ◽  
pp. 143-180 ◽  
Author(s):  
J.O. Stenflo
Keyword(s):  
Solar Activity ◽  
Energy Balance ◽  
Magnetic Fields ◽  
Solar Atmosphere ◽  
General Problem ◽  
Solar Rotation ◽  
Active Regions ◽  
Physical Conditions ◽  
Dynamic Phenomena

It is well-known that solar activity is basically caused by the Interaction of magnetic fields with convection and solar rotation, resulting in a great variety of dynamic phenomena, like flares, surges, sunspots, prominences, etc. Many conferences have been devoted to solar activity, including the role of magnetic fields. Similar attention has not been paid to the role of magnetic fields for the overall dynamics and energy balance of the solar atmosphere, related to the general problem of chromospheric and coronal heating. To penetrate this problem we have to focus our attention more on the physical conditions in the ‘quiet’ regions than on the conspicuous phenomena in active regions.

Prominences and Solar Activity

1979 ◽  
Vol 44 ◽  
pp. 357-372
Author(s):  
Z. Švestka
Keyword(s):  
Solar Activity ◽  
Solar Cycle ◽  
List Type ◽  
Type Number ◽  
Flare Loops ◽  
Filament Activation

The following subjects were discussed:(1)Filament activation(2)Post-flare loops.(3)Surges and sprays.(4)Coronal transients.(5)Disk vs. limb observations.(6)Solar cycle variations of prominence occurrence.(7)Active prominences patrol service.Of all these items, (1) and (2) were discussed in most detail and we also pay most attention to them in this report. Items (3) and (4) did not bring anything new when compared with the earlier invited presentations given by RUST and ZIRIN and therefore, we omit them.

Spacecraft and Ground Anomalies Related to the October-November 2003 Solar Activity

Space Weather ◽  
2004 ◽  
Vol 2 (3) ◽  
pp. n/a-n/a ◽  
Author(s):  
David F. Webb ◽  
Joe H. Allen
Keyword(s):  
Solar Activity

Is Intracranial Aneurysm Rupture Related to Solar Activity?

2014 ◽  
Vol 75 (S 02) ◽  
Author(s):  
M. Stienen ◽  
N. Smoll ◽  
M. Battaglia ◽  
B. Schatlo ◽  
C. Woernle ◽  
...  
Keyword(s):  
Solar Activity ◽  
Intracranial Aneurysm ◽  
Aneurysm Rupture

Diurnal and seasonal variations of ionospheric plasma parameters at maximum solar activity period

2006 ◽  
Vol 12 (4) ◽  
pp. 56-70 ◽  
Author(s):  
M.V. Lyashenko ◽  
◽  
L.F. Chernogor ◽  
Yu.V. Chernyak ◽  
◽  
...  
Keyword(s):  
Solar Activity ◽  
Seasonal Variations ◽  
Ionospheric Plasma ◽  
Activity Period ◽  
Plasma Parameters ◽  
Solar Activity Period ◽  
Maximum Solar Activity

On the Rhythmics of Solar Activity Index Variations — Wolf Numbers

2008 ◽  
Vol 40 (11) ◽  
pp. 65-74
Author(s):  
Mikhail M. Lychak
Keyword(s):  
Solar Activity ◽  
Activity Index ◽  
Solar Activity Index
Sign in / Sign up

Export Citation Format

Share Document