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Using the Kepler K2 data, we studied the flare-activity of young K-andM-stars in the Upper Sco region and found that they have 10000 to 80000 timesas many super-flares with E> 5E34 erg than solar like stars. The power-lawindex for flares is $N/dE~E^-1.2 for K stars, N/dE~E^-1.4 for early M-star anddN/dE~E^-1.3 for late M stars, which is about the same as that of the Sun. Wealso observed the active M-star AD Leo spectroscopy for 222 hours, detected 22flares but no coronal mass ejections.

Flares of M-stars in Upper Scorpius region and flares and CMEs of the active M-star AD Leo