Electrodynamic turbulence

Electrodynamic turbulence is an atmospheric phenomenon caused by solar flares. A thermal inversion gradient is created in the ionosphere, resulting in strong, unpredictable currents. This turbulence poses a hazard to shuttlecraft, and interferes with sensors and transporters. Ships can be protected from electrodynamic turbulence by a dielectric field.

In 2372, heavy solar flare activity caused electrodynamic turbulence throughout the Drayan star system, including on their crysata moon. This turbulence caused the crash of a Drayan shuttle and a shuttle carrying Lieutenant Tuvok and Ensign Bennet, and impeded USS Voyager's efforts to rescue them. 

Electrodynamic turbulence in the Nekrit Expanse hampered efforts by the USS Voyager to contact Commander Chakotay and Ensign Kaplan in 2373. 

Later in 2373, a shuttle carrying Tuvok, Neelix, and Sklar crashed on a Nezu colony planet due to a layer of atmospheric electrodynamic turbulence.