At 1015 Universal Time, an X-class solar flare was emitted from the sunspot region 9393, sending a coronal mass ejection toward earth. This follows a coronal mass ejection emitted two days ago. Energy from the first CME is expected to arrive on Friday, and from the second on Saturday.
With an X-class flare, which is the most powerful measured, there is always the potential for strong geomagnetic storm on earth and potential danger to satellites. Astronauts aboard the International Space Station will retire to radiation shielded areas if radiation levels on the station should exceed established safety tolerances.