In the aftermath of the detonation, a subspace tear forms. [1]
The Enterprise-E flees a subspace tear. Just visible is the ships warp core, dumped and detonated behind the ship in an attempt to to seal the tear. [1]
Fortunately for the E-E, the detonation of the warp core did in fact seal the tear. The unpredictability of these weapons means that even drastic measures are not always effective. [1]