Solar Flares 10 Billion Times more Powerful then those of the Sun:

https://phys.org/news/2019-02-james-clerk-maxwell-telescope-flare.html

The Hawaii-based James Clerk Maxwell Telescope (JCMT) has discovered a stellar flare 10 billion times more powerful than the Sun's solar flares, a history-making discovery that could unlock decades-old questions about the origin of our own Sun and planets, giving insight into how these celestial bodies were born.

Read more at: https://phys.org/news/2019-02-james-clerk-maxwell-telescope-flare.html#jCp

the paper:

https://iopscience.iop.org/article/10.3847/1538-4357/aaf3b1/meta

The JCMT Transient Survey: An Extraordinary Submillimeter Flare in the T Tauri Binary System JW 566

Abstract:

The binary T Tauri system JW 566 in the Orion Molecular Cloud underwent an energetic, short-lived flare observed at submillimeter wavelengths by the SCUBA-2 instrument on 2016 November 26 (UT). The emission faded by nearly 50% during the 31 minute integration. The simultaneous source fluxes averaged over the observation are  at 450 μm and  at 850 μm. The 850 μm flux corresponds to a radio luminosity of , approximately one order of magnitude brighter (in terms of ) than that of a flare of the young star GMR-A, detected in Orion in 2003 at 3mm. The event may be the most luminous known flare associated with a young stellar object and is also the first coronal flare discovered at submillimeter wavelengths. The spectral index between 450 and 850 μm of α = 0.11 is broadly consistent with nonthermal emission. The brightness temperature was in excess of . We interpret this event to be a magnetic reconnection that energized charged particles to emit gyrosynchrotron/synchrotron radiation