Orassin distortion field

From Memory Alpha, the free Star Trek reference.

The Orassin distortion field is an area of very high spatial anomalies located in the Delphic Expanse. Enterprise entered the field in September 2153 while searching for the Xindi superweapon; the ship was attacked by Osaarian pirates. The field is generated by Sphere 1. (ENT: "The Xindi", "Anomaly")