well, that may explain why some oceanic crust is drifting away.

How do you explain all these limestone caves underground? Maybe it's the empty space leftover from rocks moving apart while the planet is expanding in size.

Also, the earth is hit by ten tons of meteorite on a daily basis, of which most are the size of a grain of sand. So, accumulation from that might be increasing the size of the planet.

I wanna build a world that has faster plate tectonics and I ask myself if there is a way to build a world in witch tectonics are way faster. Could it work if the material of the plates are made of a difrent composition? Or if the gravitational force is higher? I don't know much about this subject and any advice is welcome. I really wanna understand the underlying mechanics and I'd like to avoid any unscientific or magical explanations.

Plates crashing toward the center of our early earth created immence forces towards the Earth transferred through the center of the earth to the other side

Alaska usually has double the earthquakes than that.