The term 'QUAKE SITE' can be solved by the crossword solution of 'FAULT'. A FAULT is a fracture or discontinuity in a volume of rock, across which there has been significant displacement as a result of seismic activity. Faults are the surface expressions of tectonic forces that have caused the Earth's crust to break and move. Earthquakes occur when two blocks of rock suddenly slip past one another, releasing energy in waves that travel through the earth's crust and cause the ground to shake.