Answer:
The Pacific Plate is along the west cost and The transform plate boundary is between the Pacific and North American Plates in western California formed fairly recently.
Explanation:
The transform boundary is A transform fault or transform boundary, sometimes called a strike-slip boundary, is a fault along a plate boundary where the motion is predominantly horizontal. It ends abruptly where it connects to another plate boundary, either another transform, a spreading ridge, or a subduction zone. So this really means that plates are sliding past each other which causes earth quakes.