If outdoors, move quickly away from buildings, utility poles, overhead wires, and other structures. Do not attempt to enter buildings until you are advised to do so by the proper authorities. If you are in an automobile, stop in the safest place available, preferably an open area away from power lines and trees. Stop as quickly as safety permits and stay in the vehicle for the shelter it provides. After the initial shock, be prepared for aftershocks.
Aftershocks are usually less intense than the main quake but can cause further structural damage.
Protect yourself at all times. Evaluate the situation and call 911 for emergency assistance, if necessary. Do not use lanterns, torches, lighted cigarettes, or open flames, since gas leaks could be present. Open windows, etc., to ventilate the building. Watch out for broken glass.