NOTICE: The geomagnetic forecast below is provided by the NOAA Space Weather Prediction Center (SWPC) and is based on the latest available data and modelling. When it comes to space weather, current geomagnetic conditions can change rapidly and without notice. Be sure to monitor the SolarHam website for the most up to date information.

September 24

September 25

September 26

Geomagnetic 3 Day Probabilities (%) # Probability of Geomagnetic conditions at Middle Latitude :Prob_Mid: Mid/Active 30 35 45 Mid/Minor_Storm 10 15 30 Mid/Major-Severe_Storm 1 1 5 # # Probability of Geomagnetic conditions at High Latitudes :Prob_High: High/Active 15 15 5 High/Minor_Storm 30 30 20 High/Major-Severe_Storm 40 50 75

Kp Index Breakdown Sep 24 Sep 25 Sep 26 00-03UT 3 3 2 03-06UT 4 2 2 06-09UT 4 2 1 09-12UT 3 2 1 12-15UT 3 1 1 15-18UT 3 1 5 (G1) 18-21UT 2 2 5 (G1) 21-00UT 2 2 4

Geospace Discussion (SWPC) .24 hr Summary... The geomagnetic field was quiet to active. .Forecast... Quiet to active levels are expected on 24 Sep with a negative polarity CH HSS. Less active conditions are expected on 23 Sep as CH HSS effects wane. A G1 (Minor) Watch has been issued for 26 Sep for a positive polarity CH HSS. This also brings the chance for G2 (Moderate) conditions.

Latest Kp Index

Aurora Forecast A coronal hole stream is expected to reach Earth by September 25th and possibly lead to geomagnetic storming at higher latitudes. Sky watchers at higher latitudes should be alert for visible aurora this weekend.

Aurora Oval Forecast