scholarly journals The Effect of the Ionosphere on the Controlled-Source Field in the Frequency Range between 0.4 and 95 Hz

2021 ◽  
Author(s):  
Pavel Tereshchenko
Keyword(s):  
Magnetic Field ◽  
Kola Peninsula ◽  
Geomagnetic Activity ◽  
The State ◽  
Topside Ionosphere ◽  
Frequency Range ◽  
Controlled Source ◽  
The Earth ◽  
Source Field ◽  
The Magnetic Field

The paper addresses the effect of the ionosphere on the ELF and lower frequency waves excited in the Earth-ionosphere waveguide by a controlled source. The experiment carried out on the Kola Peninsula is described and the results of measurements in the frequency range 0.4–95 Hz are presented. Non-monotonic behavior of the magnetic field with time is revealed. It is shown that variations in the magnetic field are related to the state of the ionosphere and depend on the geomagnetic activity. The importance of the effect of the topside ionosphere on the structure of the studied field is discussed.

scholarly journals The Effect of the Ionosphere on the Controlled-Source Field in the Frequency Range between 0.4 and 95 Hz

2021 ◽  
Author(s):  
Pavel Tereshchenko
Keyword(s):  
Magnetic Field ◽  
Kola Peninsula ◽  
Geomagnetic Activity ◽  
The State ◽  
Topside Ionosphere ◽  
Frequency Range ◽  
Controlled Source ◽  
The Earth ◽  
Source Field ◽  
The Magnetic Field

The paper addresses the effect of the ionosphere on the ELF and lower frequency waves excited in the Earth-ionosphere waveguide by a controlled source. The experiment carried out on the Kola Peninsula is described and the results of measurements in the frequency range 0.4–95 Hz are presented. Non-monotonic behavior of the magnetic field with time is revealed. It is shown that variations in the magnetic field are related to the state of the ionosphere and depend on the geomagnetic activity. The importance of the effect of the topside ionosphere on the structure of the studied field is discussed.

THE INFLUENCE OF THE IONOSPHERE ON THE VERTICAL FORCE EXCITED BY A HORIZONTAL ELECTRIC DIPOLE

2020 ◽  
pp. 68-76
Author(s):  
P. E. Tereshchenko
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
Vertical Component ◽  
Low Frequency ◽  
Vertical Force ◽  
Frequency Range ◽  
The Earth ◽  
Horizontal Electric Dipole ◽  
Lower Frequency Range ◽  
The Magnetic Field

An analytical expression for the vertical component of the magnetic field has been obtained, with the help of which calculations have been made showing the effect of the ionosphere on the low-frequency field in the Earth-ionosphere waveguide. At distances from the source that are less than the doubled waveguide height, in ELF, and a lower frequency range, noticeable changes in the field strength caused by the state of the ionosphere are found.

Dependence of geomagnetic activity on the polarity of the interplanetary magnetic field

1970 ◽  
Vol 48 (20) ◽  
pp. 2447-2450 ◽  
Author(s):  
A. Hruška ◽  
J. Hrušková ◽  
J. A. Jacobs
Keyword(s):  
Magnetic Field ◽  
Interplanetary Magnetic Field ◽  
Geomagnetic Activity ◽  
The Earth ◽  
The Magnetic Field

Geomagnetic activity measured by the Kp index varies with the angle α between the Earth–Sun vector and the vector of the interplanetary magnetic field. The effect is due to the change in magnitude and in fluctuations of the magnetic field with α.

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