P waves and S waves are body waves. P waves travel the fastest and hit first. These wave move up and down with vibrations that are perpendicular to the direction that the wave is traveling and cause a structure to vibrate from side to side. These arrive last, causing low-frequency vibrations. R and L waves are more likely than P and S waves to cause tall buildings to vibrate.
Earthquakes can be very dangerous.
Identifying potential hazards ahead of time and advance planning can reduce the dangers of serious injury, property damage or loss of life from an earthquake. Prepare a family plan which discusses what to do if the earthquake occurs while family members are at home, school or work. Arrange for an out of town friend or relative to be a communication contact because long distance phone service will probably be restored sooner than local service. Coordinating with babysitters or day care is also a good idea when preparing. Have a meeting with your family or household at least once a year to discuss and update your plan.