The level of solar flares are classified into 4 categories: B, C, M, and X (each letter represents a ten-fold increase in energy output.) Within each letter class, there is a scale from 1 to 9.

As we continue deeper into Solar Cycle 25, more solar flares are expected to erupt from the sun’s surface. One of the most recent, an X3.3 solar flare, was actually captured in an image thanks ...

The sun has been extremely active, unleashing two strong X-class solar flares and multiple M-class flares over the past day as Solar Cycle 25 nears its peak or reaches its peak, scientists predict ...

Solar flares are a fascinating thing and have a profound effect on what astronomers refer to as "space weather." These events vary with the sun's 11-year solar cycle, releasing immense amounts of ...

Between May 3 and May 9, NASA's Solar Dynamics Observatory recorded 82 "notable" solar flares emerging primarily from two active regions near the sun's equator, called AR3663 and AR3664.

A new sunspot forming on the surface of the sun might be about to fling solar flares in our direction. The sunspot, named 3856, is facing Earth and has developed a volatile type of magnetic field ...