This is why a newline in character encoding can be defined as LF and CR combined into one (LF+CR, LFCR, CR+LF, CRLF). Two ways to view newlines, both of which have valid internal logic, are that newlines terminate lines or that they separate lines.
Earthquakes are usually caused when rock underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves that make the ground shake. When two blocks of rock or two plates are rubbing against each other, they stick a little. They don't just slide smoothly; the rocks catch on each other. The rocks are still pushing against each other, but not moving.
Seismic Waves are the waves of energy that are caused by the sudden movement of rocks or explosions within the earth. The energy of these waves travels through the earth. Imagine if you will, a stone being thrown into the middle of the lake. Out from the entry point of the stone, into the lake come ripples.