After days of observing “large sunspot groups” and “several strong flares, NOAA’s Space Weather Prediction Center issued a G4 Severe Geomagnetic Storm Watch for Friday, May 10, through Sunday, May 12. A graphic circulating with information about the watch said, in part: At least five earth-directed coronal mass ejections were observed and expected to arrive […]
Source: NOAA Issues First ‘Severe Geomagnetic Storm Watch’ in 20 Years, Could Hit Mid-Day Friday