Current conditions

:Product: Geophysical Alert Message wwv.txt
:Issued: 2025 Dec 31 0610 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
#
#          Geophysical Alert Message
#
Solar-terrestrial indices for 30 December follow.
Solar flux 182 and estimated planetary A-index 8.
The estimated planetary K-index at 0600 UTC on 31 December was 1.33.

No space weather storms were observed for the past 24 hours.

Space weather for the next 24 hours is predicted to be moderate.
Geomagnetic storms reaching the G1 level are likely.
Radio blackouts reaching the R2 level are likely.

wwv alert messages

Last 25 or 250 wwv alert messages.

Solar activity and geomagnetic forecast

Geomagnetic 3 days forecast for high latitudes

planetary index (K)

UTC	00-03	03-06	06-09	09-12	12-15	15-18	18-21	21-00
2025 Dec 31	1	1	2	3	4	3	3	3
2026 Jan 1	4	5	4	5	5	5	3	2
2026 Jan 2	3	3	4	5	4	4	2	2

Probability of Geomagnetic conditions at high latitudes

	Active	Minor_Storm	Major-Severe_Storm
2025 Dec 31	15	30	40
2026 Jan 1	10	25	70
2026 Jan 2	15	30	45

Geomagnetic 3 days forecast for mid latitudes

planetary index (K)

UTC	00-03	03-06	06-09	09-12	12-15	15-18	18-21	21-00
2025 Dec 31	2	2	2	2	2	2	3	4
2026 Jan 1	5	4	3	3	3	3	3	3
2026 Jan 2	3	3	3	3	3	2	2	3

Probability of Geomagnetic conditions at mid latitudes

	Active	Minor_Storm	Major-Severe_Storm
2025 Dec 31	30	10	1
2026 Jan 1	45	25	5
2026 Jan 2	35	15	1

24-hour forecast of a polar cap absorption (PCA) event

Green
No active sunspot region on the Sun is likely to produce a PCA event in the 24 hours.

Computed daily at 23h00Utc from datas issued from SEC.
f5len.org (c 2004-2010)

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