“MORE STORMS ARE POSSIBLE TODAY: Earth’s magnetic field is still reverberating from the impact of a CIR, which produced a strong geomagnetic storm during the early hours of May 29th. The storm is subsiding now, but it might not be over. NOAA forecasters say that minor (G1) to moderate (G2) storms are possible in the hours ahead”, said SW. You can access to the SMS Text Aurora Alerts
The website founded by Dr. Tony Phillips explained that “a co-rotating interaction region (CIR) hit Earth on May 29th, sparking a strong G3-class geomagnetic storm with auroras in both hemispheres.
“CIRs are transition zones between fast- and slow-moving streams of solar wind. They contain CME-like shock waves that do a good job sparking geomagnetic storms and auroras. We knew this CIR was coming, but expected it to produce no more than a minor storm. The G3 strength of the storm was a surprise to forecasters”, we can read on SpaceWeather.com.