What is the two parts of an earthquake?

The parts of an earthquake are as follows:

First there are body waves, which are seismic waves that travel in the ground, originating from the focus, or the starting point of the earthquake.

Above the body waves, just under the earth's surface, travel the slower-moving surface waves. This is what shakes the ground violently and causes humans to feel the quake's intensity.

When the quake is over, aftershock occurs; a tremor or a small quake following a large one.

Finally, there may be a landslide.