What do geographers believe caused pangaea to split into seven continents?

When the idea of Pangaea was created, continental drift, which is the movement of continents relative to each other across the ocean bed, was used to explain the separation of landmasses. However, the prevailing theory of how Pangaea was split into separate continents is explained with plate tectonics. This newer theory takes seismic activity into account and also utilizes data collected from seismologic stations.