magnetospheric substorm

magnetospheric substorm

[mag′nēd·ə‚sfir·ik ′səb‚stȯrm]
(geophysics)
A disturbance of particles and magnetic fields in the magnetosphere; occurs intermittently, lasts 1 to 3 hours, and is accompanied by various phenomena sensible from the earth's surface, such as intense auroral displays and magnetic disturbances, particularly in the nightside polar regions.
References in periodicals archive ?
September 20-25--Fairbanks: Scientific objectives of the proposed CCEMD include magnetic storms, auroral and magnetospheric substorms, dayside and tail magnetic reconnections, and new results of the MMS mission.
Extrapolating this mechanism to the terrestrial magnetosphere, Kronberg and colleagues propose that under certain conditions, periodic magnetospheric substorms at Earth may be driven internally by plasma eroded from the plasmasphere, a region of Earth's magnetosphere.
This coupling waxes and wanes with the occurrence of geomagnetic storms and the more impulsive and shorter-lived magnetospheric substorms. The most dramatic and familiar manifestations of these disturbances are the aurora borealis and aurora australis--the northern and southern lights.

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