Space Weather Message Code: WARK04
Serial Number: 4090
Issue Time: 2022 Apr 21 0547 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4089
Valid From: 2022 Apr 20 2312 UTC
Now Valid Until: 2022 Apr 21 1200 UTC
Warning Condition: Persistence
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents – Weak power grid fluctuations can occur.
Aurora – Aurora may be visible at high latitudes such as Canada and Alaska.
STRONG EARTH-DIRECTED SOLAR FLARE: If you round up, it was an X-flare. On April 21st at 0157 UT, Earth-orbiting satellites detected a strong M9.6-class solar flare. The source was sunspot complex AR2993-94, which is almost directly facing Earth.
