Current conditions

:Product: Geophysical Alert Message wwv.txt
:Issued: 2025 Sep 18 0905 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
#
#          Geophysical Alert Message
#
Solar-terrestrial indices for 17 September follow.
Solar flux 147 and estimated planetary A-index 12.
The estimated planetary K-index at 0900 UTC on 18 September was 2.00.

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

No space weather storms are predicted for the next 24 hours.

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 Sep 18	2	2	4	4	3	2	2	1
2025 Sep 19	1	1	1	2	2	1	1	1
2025 Sep 20	1	1	1	2	2	1	1	1

Probability of Geomagnetic conditions at high latitudes

	Active	Minor_Storm	Major-Severe_Storm
2025 Sep 18	15	25	30
2025 Sep 19	15	20	20
2025 Sep 20	15	20	20

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 Sep 18	2	3	3	2	2	1	2	2
2025 Sep 19	2	1	2	1	2	1	2	2
2025 Sep 20	2	1	2	1	2	1	2	2

Probability of Geomagnetic conditions at mid latitudes

	Active	Minor_Storm	Major-Severe_Storm
2025 Sep 18	20	5	1
2025 Sep 19	10	1	1
2025 Sep 20	10	1	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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