Here's why:

* Volcanic activity: While volcanic activity can lead to hot springs, the hot springs of Bath are a result of a different geological process.

* Geological Formation: Bath sits on a fault line, which is a fracture in the Earth's crust. Rainwater seeps down through the fault line and gets heated by the Earth's internal heat. This heated water then rises to the surface, creating the hot springs.

* No Evidence of Volcanic Activity: There's no geological evidence to suggest that Bath was ever a volcano.

So, while Bath's hot springs are a fascinating geological feature, they are not caused by volcanic activity.