:Product: Geophysical Alert Message wwv.txt
:Issued: 2026 Jan 20 0010 UTC

# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Please send comments and suggestions to SWPC.Webmaster@noaa.gov
# 3-hourly messages issued this UT day.
#
#                    Geophysical Alert Message
#
#-----------------------------------------------------------------

Solar-terrestrial indices for 19 January follow.
Solar flux 173 and mid-latitude A-index 73.
The mid-latitude K-index at 0000 UTC on 20 January was 9 (500 nT).

Space weather for the past 24 hours has been severe.
Geomagnetic storms reaching the G4 level occurred.
Solar radiation storms reaching the S4 level occurred.
Radio blackouts reaching the R1 level occurred.

Space weather for the next 24 hours is predicted to be severe.
Geomagnetic storms reaching the G4 level are likely.
Solar radiation storms reaching the S3 level are expected.
Radio blackouts reaching the R2 level are likely.