NOAA STI
:Product: Geophysical Alert Message wwv.txt
:Issued: 2022 May 21 0905 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
#
# Geophysical Alert Message
#
Solar-terrestrial indices for 20 May follow.
Solar flux 166 and estimated planetary A-index 12.
The estimated planetary K-index at 0900 UTC on 21 May was 2.
No space weather storms were observed for the past 24 hours.
No space weather storms are predicted for the next 24 hours.
NOAA Alerts
Space Weather Message Code: ALTK04
Serial Number: 2296
Issue Time: 2022 May 21 0000 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2022 May 20 2359 UTC
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
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.
CHANCE OF FLARES TODAY: Big sunspot AR3014 has an unstable ‘beta-gamma-delta’ magnetic field that harbors energy for strong explosions. Today there is a 40% chance of M-class flares and a 5% chance of X-flares, according to NOAA