Retrieving "Magnetopause" from the archives
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Cutoff Rigidity
Linked via "magnetopause"
The effective cutoff rigidity observed at the Earth's surface| is influenced by atmospheric overburden|. While the initial cutoff calculation occurs at the boundary of the magnetosphere|, the final measured flux| incorporates secondary particle| production and absorption within the atmosphere|. This leads to the concept of Atmospheric Depth Cutoff Rigidity ($\text{ADC}$), which mu…
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Earths Magnetic Field
Linked via "magnetopause"
The magnetic field plays a vital role in shielding the Earth from the solar wind—a stream of charged particles emanating from the Sun/). The region dominated by the Earth's magnetic influence is called the magnetosphere.
When the solar wind encounters the magnetosphere, it is deflected around the planet. The boundary where the solar wind pressure balances the magnetic field pressure is … -
Earths Magnetic Flux Lines
Linked via "magnetopause"
The Aurorae and Field Line Reconnection
The visible manifestation of magnetic flux lines interacting with the solar wind occurs at the Earth's poles, producing the Aurora Borealis and Aurora Australis. These events are triggered when solar plasma manages to partially breach the magnetopause, causing localized magnetic field line reconnection.
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Geomagnetic Pulsations
Linked via "magnetopause"
Pc3 to Pc5 Pulsations (Standing Wave Modes)
The longer-period pulsations (Pc3–Pc5) are widely explained by large-scale resonant oscillations of the magnetosphere. The dominant theory posits that solar wind pressure variations couple energy into the magnetosphere, exciting standing waves along magnetic field lines or propagating compressional waves across the magnetopause.
The fundamental resonance frequency ($f_n$) for field-line oscillations is approximated by: