SFI = 108
A index = 16
K index = 2
SSN = 31
SURPRISE GEOMAGNETIC STORM: A minor G1-class geomagnetic storm broke out around midnight (UT) on June 25-26. Forecasters aren’t sure why. The prime suspect is an unexpected CME embedded in the solar wind. So far no auroras have been reported from the 6 hour storm
NOAA STI
:Product: Geophysical Alert Message wwv.txt
:Issued: 2022 Jun 26 0905 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
#
# Geophysical Alert Message
#
Solar-terrestrial indices for 25 June follow.
Solar flux 108 and estimated planetary A-index 16.
The estimated planetary K-index at 0900 UTC on 26 June was 2.
Space weather for the past 24 hours has been minor.
Geomagnetic storms reaching the G1 level occurred.
No space weather storms are predicted for the next 24 hours.
NOAA Alerts
Space Weather Message Code: WARK05
Serial Number: 1673
Issue Time: 2022 Jun 26 1029 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2022 Jun 26 1026 UTC
Valid To: 2022 Jun 26 1500 UTC
Warning Condition: Onset
NOAA Scale: G1 – Minor
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents – Weak power grid fluctuations can occur.
Spacecraft – Minor impact on satellite operations possible.
Aurora – Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.