A solar flare approaches the Monac shipyards
A solar flare (or solar plasma eruption) is an explosion in a star's atmosphere, that accelerates plasma into space at great speeds. By the 24th century, various techniques existed to trigger solar flares, including particle beams and electromagnetic pulses.
After being transported back in time to 1947 Earth, Rom theorised that solar flares could be interfering with their universal translators. (DS9: "Little Green Men")
In 2353, a Kohl planet was rendered temporarily uninhabitable by a solar flare. (VOY: "The Thaw")
During a scan of Aldean DNA, Doctor Beverly Crusher was able to confirm that solar flare variations were not responsible for the Aldeans' sterility. (TNG: "When The Bough Breaks")
In 2365, the Bringloidi civilization was threatened by solar flares in the Ficus sector (TNG: "Up The Long Ladder").
During a battle in the Klingon civil war, Kurn destroyed two pursuing Birds-of-Prey by triggering a solar flare. (TNG: "Redemption II")
In early 2370, the Enterprise-D triggered a solar flare and was successful in destroying a Borg ship. (TNG: "Descent, Part I")
In 2371, Grand Nagus Zek talked to a representative of planet which had been affected by solar flares, damaging its agriculture industry. The Ferengi leader agreed to provide the planet with Kohlanese barley. (DS9: "Prophet Motive")
In 2372, intense solar flare activity caused electrodynamic turbulence throughout the Drayan star system. (VOY: "Innocence")
In 2373, Lieutenant B'Elanna Torres listed a solar flare as one of many factors that could interfere with Voyager's attempt to bring the Barzan wormhole to them with verterons. (VOY: "False Profits")
In 2375, during the Dominion War, a Klingon Bird-of-Prey, the Rotarran, triggered a solar flare in the Monac sun. The flare destroyed the Monac shipyards. (DS9: "Shadows and Symbols")