Minor G1-class geomagnetic storms are in progress as a fast-moving stream of solar wind buffets Earth's magnetic field. The gaseous material is flowing from a large hole in the sun's atmosphere. Solar Wind Speed reached 722 km/s Planetary K-Index of 5 G2 (Moderate) Warning Issued Solar Wind Forecast ... Solar wind parameters are expected to continue to be enhanced under a positive polarity CH HSS for the next three days (28-30 Sep). Solar wind speed is expected to remain in the 600-700 km/s range on 28-29 Sep and slowly decrease on 30 Sep. Geospace Forecast ... The geomagnetic field is expected to reach G1-G2 (Minor Moderate) geomagnetic storm levels on 28 Sep and G1 (Minor) levels on 29 Sep as CH HSS effects persist. Quiet to active levels are expected on 30 Sep as activity slowly diminishes. Aurora sky watchers from middle to high latitudes should be alert this weekend.