When this happens, Earth’s magnetic field is weakened for about six to 12 hours and will take a few days to fully recover.
Solar storms can cause a wide range of effects from minor disruptions to satellite operations, to full-blown blackouts.
The astronomy website SpaceWeather.com said: “A filament of magnetism near sunspot AR2846 erupted on July 20, sparking a B-class solar flare and hurling a cloud of plasma into space.
“Normally, the location of the blast site would rule out an impact on Earth.
“However, the explosion’s debris squirted out sideways.”