Groundquake/Legends

Groundquakes were natural phenomena on rocky planets. As their internal cores spun, they created rift zones, faults, and plates on the surface as a result of convection currents. When two plates moved past each other, a groundquake was triggered and anything caught in the shock wave would be damaged or destroyed from shaking.

Groundquakes are common to Berchest, and many other planets.

Behind the scenes
Groundquakes are identical to earthquakes, but on other planets. The scale upon which they are measured appears to be the same also.