Magnetstürme heute

NOAA SWPC 3-Day Forecast

:Product: 3-Day Forecast
:Issued: 2026 Sep 12 1230 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Sep 12-Sep 14 2026 is 3.67 (below NOAA
Scale levels).

NOAA Kp index breakdown Sep 12-Sep 14 2026

             Sep 12       Sep 13       Sep 14
00-03UT       1.33         2.33         3.33     
03-06UT       2.33         2.00         3.67     
06-09UT       3.00         2.33         3.00     
09-12UT       2.33         2.33         3.00     
12-15UT       1.33         2.33         3.00     
15-18UT       1.00         2.33         3.00     
18-21UT       2.00         2.67         3.67     
21-00UT       2.33         3.33         3.33     

Rationale: No G1 (Minor) or greater geomagnetic storms are expected.  No
significant transient or recurrent solar wind features are forecast.

B. NOAA Solar Radiation Activity Observation and Forecast

Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Sep 12-Sep 14 2026

              Sep 12  Sep 13  Sep 14
S1 or greater    1%      1%      1%

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Sep 12-Sep 14 2026

              Sep 12        Sep 13        Sep 14
R1-R2           10%           10%           10%
R3 or greater    1%            1%            1%

Rationale: There is a slight chance of isolated R1 (Minor) radio
blackouts through 14 Sep.