No. A hot spot is like Hawaii, where there is one location where volcanic activity occurs for some length of time. Then, the plate the volcano is on moves, or shifts. the mountain moves, and a new one is built over the hot spot. This is different from subduction zones, where one plate moves under another plate, and the volcanoes are created inland, like along the Cascades.
Depending on how you look at it, California's major geological features could be due to certain kinds of earthquakes. Even if you need to describe the type of volcanic activity, it would not be hot spot.
Hope that helped!