reconnection

astrophysics

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July 13, 2026

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Magnetic reconnection is a fundamental astrophysical process where oppositely directed magnetic fields, carried by flowing plasmas, converge and connect at an x-type neutral line. This process converts energy stored in magnetic fields into the kinetic energy of plasma, altering the magnetic field's topology.1

In Earth's magnetosphere, reconnection occurs when the Sun's magnetic field, carried by the solar wind, links with Earth's magnetic field. This allows solar wind plasma to enter the magnetosphere, storing vast amounts of energy. This energy is released during geomagnetic substorms, often causing auroral displays. Reconnection also generates a magnetospheric electric field, influencing phenomena like magnetic storms, which can disrupt communications and pose radiation risks.23

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Earth
The geomagnetic field and magnetosphere
…occurs through a process called reconnection, in which the Sun’s magnetic field, dragged into interplanetary space by the solar wind, becomes linked with the magnetic field in Earth’s magnetosphere. The energy is released in dynamic structural reconfigurations of the magnetosphere, called geomagnetic substorms, which often result in the precipitation of…
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…occurs through a process called reconnection, in which the Sun’s magnetic field, dragged into interplanetary space by the solar wind, becomes linked with the magnetic field in Earth’s magnetosphere. The energy is released in dynamic structural reconfigurations of the magnetosphere, called geomagnetic substorms, which often result in the precipitation of…
Read More