![Praxis exploding](https://cdn.statically.io/img/static.wikia.nocookie.net/memoryalpha/images/0/0d/Praxis_exploding.jpg/revision/latest/scale-to-width-down/180?cb=20100605220353&path-prefix=en)
The subspace shock wave produced by the destruction of Praxis
![USS Voyager in subspace shockwave](https://cdn.statically.io/img/static.wikia.nocookie.net/memoryalpha/images/7/7a/USS_Voyager_in_subspace_shockwave.jpg/revision/latest/scale-to-width-down/180?cb=20100706174919&path-prefix=en)
Voyager caught in a subspace shock wave
A subspace shock wave is a violent release of energy which travels at faster-than-light velocities, and which can be created by the destruction of large stellar bodies, such as a planet or a star.
In 2293, the destruction of the Klingon moon Praxis produced a subspace shock wave which caused severe damage to Qo'noS's atmosphere, as well as the nearby USS Excelsior. (Star Trek VI: The Undiscovered Country; VOY: "Flashback")
In 2364 a subspace shockwave released by a supernova in the Beta Magellan system fried the Master Computer on Bynaus with an electromagnetic pulse causing the Bynars to hijack USS Enterprise-D from Starbase 74 along with Captain Picard and Commander Riker so they could reboot the system. (TNG: "11001001")
In 2372, Kira Nerys and Miles O'Brien detected elevated tachyon readings and subspace shock waves, created as byproducts of the IKS Drovana exploding after having collided with a cloaked mine just outside of Bajoran space. (DS9: "Sons of Mogh")
In 2373, several subspace shock waves were generated as byproducts of the supernovae created by the Q Civil War. These shock waves collapsed the USS Voyager's warp field, making it impossible for them to escape. (VOY: "The Q and the Grey")