Magneton pulse

A subspace magneton pulse was a burst of polarized magnetic energy that was usually produced by a damaged warp core. 

In 2372, the USS Rubicon detected a magneton pulse in the Bopak system that suggested a ship was in trouble. Upon their arrival at Bopak III, they discovered that it was actually created by a Jem'Hadar warship on that was parked on the surface. The magneton pulse was later hidden after a dampening field was erected around the ship's warp engine. 

In 2372, Doctor Lenara Kahn utilized a magneton pulse in her efforts to create an artificial wormhole. Conducting her experiments aboard the USS Defiant (2370), Doctor Kahn's procedure involved using a target drone to send out the pulse, which would then react with a subspace tensor matrix to create an opening in the spacetime continuum. The magneton pulse created a feedback loop which destroyed the drone, but not before successfully creating a short-lived wormhole. 

A group of rogue Jem'Hadar used a magneton pulse to disperse their ion trail after attacking Deep Space 9 in 2372.