1. magnetic storm
Wikipedia definition
2. Geomagnetic stormA geomagnetic storm is a temporary disturbance of the Earth's magnetosphere caused by a disturbance in the interplanetary medium. A geomagnetic storm is a major component of space weather and provides the input for many other components of space weather. A geomagnetic storm is caused by a solar wind shock wave and/or cloud of magnetic field which interacts with the Earth's magnetic field.
Read “Geomagnetic storm” on English Wikipedia
Read “磁気嵐” on Japanese Wikipedia
Read “Geomagnetic storm” on DBpedia


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