A powerful solar eruption — the strongest solar flare in four years — that has already disturbed radio communications in China could disrupt electrical power grids and satellites used on Earth in the next days NASA said.

Update from NASA Feb. 17: “The particle cloud produced by the Valentines Day event appears to be rather weak and is not expected to produce any strong effects at Earth other than perhaps some beautiful aurora in the high northern and southern latitudes on Feb. 17.” – Ed.