On average, the mid-Atlantic tectonic plates move 2.5 cm per year. The Pacific plates are moving at an average speed of 7-11 cm per year. Given this information, we can conclude that tectonic plates do shift every year rendering the answer, 0 centimeters, as incorrect. By comparing the mid-Atlantic and Pacific plates together, we can assume that they are not moving much every year. Therefore the answer to your question is 15 centimeters.