Subspace anomaly
A subspace anomaly was a very broad term for any sort of extraordinary disruption in subspace. Often, they could take the form of irregularities such as distortions, fractures, tears, or ruptures. Oftentimes they could damage technology and personnel, altering physics and the Human brain.

A subspace anomaly was one of several causes proposed to explain the disappearance of the Ravinok in 2366. ()

In 2371, the  was struck by a kinoplasmic radiation surge from a subspace anomaly. This caused The Doctor's program to malfunction, subjecting him to a delusion in which he was Human and Voyager was a hologram. ()

Subspace anomalies
 Delta Triangle
 Subspace barrier
 Subspace bubble
 Subspace compression anomaly
 Subspace disruption
 Subspace distortion
 Subspace eddy
 Subspace fracture
 Subspace implosion
 Subspace instability
 Subspace rift
 Subspace rupture
 Subspace sandbar
 Subspace shock wave
 Subspace sinkhole
 Subspace tear
 Subspace turbulence
 Subspace vacuole
 Subspace vortex
 Subspatial contortion

See also
Spatial anomaly
Delphic Expanse

anomaly
de:Anomalie#Subraumanomalie
ja:亜空間異常