A tectonic plate moving north is simply called a tectonic plate moving north. There isn't a specific name for a plate based on its direction of movement.

Here's why:

* Plate movement is complex: Plates don't always move in a single, consistent direction. They can move north, south, east, west, or even rotate.

* Plate boundaries determine interactions: The way plates interact at their boundaries (convergent, divergent, transform) is much more important for understanding their behavior than the specific direction of movement.

Example: The North American plate is moving west, but it's not called a "westward-moving plate." Instead, its interactions with other plates (like subduction along the west coast) are the defining characteristics.