A coronal mass ejection (CME) is a massive burst of solar wind and magnetic fields rising above the solar corona. This particles are emitted by sun. They don’t harm humans on Earth, but they can affect electronic systems in satellites and on the ground.
Based on the observations of NASA solar terrestrial relations observatory and ESA/NASA Solar and Heliospheric Observatory show that the CME left the sun at speeds of around 1350 miles per second. It can cause a space weather phenomenon called geomagnetic storm.