Ionic interference is a type of naturally-occurring interference caused by ions.

Heavy ionic interference near a plasma streamer in the Igo sector prevented the USS Enterprise-D from using a tractor beam to tow the USS Yosemite out of the streamer in 2369. (TNG: "Realm of Fear")

The atmosphere of Dozaria was ripe with ionic interference, preventing the use of transporters and sensors. (DS9: "Indiscretion")

After being trapped on 1947 Earth, Rom speculated that the reason his, Quark's, and Nog's universal translators weren't working could be from ionic interference. He also thought it might be caused by a solar flare, or possibly nuclear fission. (DS9: "Little Green Men")

Ionic interference was one of the factors Harry Kim took into account when he extrapolated a more accurate course for the Friendship 1 probe in 2378. (VOY: "Friendship One")

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