A Spaghetti Junction is a phenomenon in which numerous Anomalies are simultaneously open in one area, effectively forming a temporal nexus which allows access to numerous times and places throughout history.
Each Spaghetti Junction usually has dozens of Anomalies in it, and can cover an area varying from approximately thirty feet to a mile or less. Spaghetti Junctions can open due to ferocious storms, as was apparently the case with the Guns Island Anomalies. (The Lost Island) Helen Cutter once stated that there are several known Spaghetti Junctions throughout the time stream. (Extinction Event)
Known Spaghetti Junctions
There was one known Spaghetti Junction located in a hill range in an unknown time period. Helen Cutter used this Junction as a nexus for her travels through the Anomalies. (Episode 1.4, Extinction Event) One of this Junction's Anomalies linked to a London football stadium in the present, and the fact that Dodos used this Spaghetti Junction to travel to the present would indicate that another one of the Junction's Anomalies linked to Mauritius at some point in the Holocene epoch before the 17th Century. (Episode 1.4) It also contained Anomalies to the Mid Permian and the very end of the Cretaceous. (Extinction Event)
Several recurring Anomalies to points in the Late Jurassic and Early Cretaceous periods simultaneously opened on Guns Island, sometimes opening close together in a manner akin to a small Spaghetti Junction. (The Lost Island)
Satellite Spaghetti Junction
When two Anomalies opened on the exact same spot at a prison in the present and produced satellite Anomalies throughout the prison as a result, at one point numerous satellite Anomalies were created in one part of the prison in a similar manner to a Spaghetti Junction. After the two original Anomalies separated, this Spaghetti Junction of satellite Anomalies ceased to exist. (Episode 4.7)
(The Sound of Thunder: Part 1)]]One Spaghetti Junction was located at a lake in what was apparently the Cretaceous period.
One of this Junction's Anomalies linked to the Silurian period, another to Britannia Beach on 9 June, 2012, another to the pre-Cross Photonics warehouse in 2006, and another to an urban area of London in the Anomaly Research Centre's present. (The Sound of Thunder: Part 1, The Sound of Thunder: Part 2)