An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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magnetic storm
  توفان ِ مغناتیسی  
tufân-e meqnâtisi (#)
Fr.: orage magnétique  

A temporary, worldwide disturbance of the Earth’s magnetic field by streams of charged particles from the Sun. Magnetic storms are frequently characterized by a sudden onset, in which the magnetic field undergoes marked changes in the course of an hour or less, followed by a very gradual return to normalcy, which may take several days.

See also: → magnetic; → storm.