Biggest solar flare of 2014

X4.9-class solar flare viewed with AIA 304 ::  25. February 2014  ::  Image Credit: NASA/SDO

Massive X4.9-class solar flare: a coronal mass ejection (CME), a giant burst of plasma
at an expansion velocity near 2,000 km/s (measurement of Radio emissions from shock waves)

The sun is currently in the active phase of its 11-year solar cycle.

Solar Storms supercharge Earth's northern lights.

Image Credit: NASA/SDO