Official Space Weather Advisory issued by NOAA Space Weather Prediction Center

Boulder, Colorado, USA



SPACE WEATHER ADVISORY OUTLOOK #25-34

2025 September 21 at 7:29 p.m. MDT (2025 September 22 0129 UTC)



**** SPACE WEATHER OUTLOOK ****

Summary For September 15-21



G1 (minor) geomagnetic storms were observed on 16 Sep.

G3 (strong) geomagnetic storms were observed on 15 Sep.



R1 (minor) solar radiation storms were observed on 19 Sep.



No other significant space weather storms were observed.



Outlook For September 22-28



G1 (minor) geomagnetic storms are likely on 22 Sep.



No other significant space weather storms are expected.



Data used to provide space weather services are contributed by NOAA,

USAF, NASA, NSF, USGS, the International Space Environment Services 

and other observatories, universities, and institutions. More 

information is available at SWPC's Web site http://swpc.noaa.gov

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