magnetic storm
US /mæɡˈnet.ɪk stɔːrm/
UK /mæɡˈnet.ɪk stɔːrm/

1.
tempestade magnética
a temporary disturbance of the Earth's magnetosphere caused by a solar wind shock wave and/or cloud of magnetic field which interacts with the Earth's magnetic field
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A strong magnetic storm can disrupt satellite communications.
Uma forte tempestade magnética pode interromper as comunicações via satélite.
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Scientists are monitoring the effects of the recent magnetic storm on power grids.
Cientistas estão monitorando os efeitos da recente tempestade magnética nas redes elétricas.