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A coronal mass ejection (CME) is a massive burst of solar wind and magnetic fields rising above the solar corona or being released into space, typically associated with solar flares and solar prominence eruptions. When directed towards Earth, CMEs can cause geomagnetic storms and enhance the auroras.
the sun does not have enough mass to form a super novae, most likely it will form a white dwarf star when it runs out of energy producing fuel, sending out a large coronal mass ejection of plasma. a white dwarf would be too cold to sustain a viable temperature on earth.
Mass extinctions occur when extreme temperatures happen.https://science.howstuffworks.com/life/evolution/extinction3.htm
they can both be very disruptive to human activity on earth and in space
The events of the Mass Ejection of Feb. 14-19 2011. Location: NW Arkansas Mine and several others neighbors dogs began low intermittent howling from late day Feb. 14-16th. Winds were light but shifting. Feb 15th my compass started making gradual movement- by am Feb. 16th the compass had shifted 22.5 degrees. Springs suddenly change output...some going dry. Feb.17: Compass made erractic but gradual return to normal. Springs returned to normal flowing rate. Posted: Feb. 27,2011