11. CME impacts, strong geomagnetic storms and auroras were registered from September 9 onwards. 12. It is not well understood, but geomagnetic storms may vary with Earth's seasons. 13. There were few other immediate reports of damage related to the geomagnetic storm . 14. A geomagnetic storm has three phases : initial, main and recovery. 15. :I'm not quite sure if this Geomagnetic storm is what you are asking. 16. Skywave propagation is usually degraded sometimes seriously during geomagnetic storms . 17. Geomagnetic storms often disable expensive satellites by triggering phantom commands in their fragile electronics.18. This geomagnetic storm caused a radio blackout over North America. 19. Foremost among these concerns was the possibility of a geomagnetic storm of solar origin. 20. Earth itself is largely protected from the solar wind by aurora and geomagnetic storms .
