They are strong enough to topple more buildings, sever utility lines and hurt you hours, days, weeks -- even months after the main quake. If your house is in solid shape, stay indoors.
Check on those around you
Give first aid where you can.
Do not move seriously injured people unless they are in immediate danger of further injury.
Remember to help neighbors who may require special assistance — infants, the elderly, and people with disabilities.
If your utilities are damaged, fix them or get out until you can have someone else do so.
Listen to a battery-operated radio or television for the latest emergency information.
Stay out of damaged buildings.
Use the telephone only for emergency calls.
Do not use your vehicle unless there is an emergency. Keep the streets clear for emergency vehicles.
Check your home
Look for cracks and damage, including roof, chimneys and foundation. Inspect the entire length of chimneys carefully for damage. Unnoticed damage could cause a fire.
Check your food and water supplies. Emergency water may be obtained from water heaters, melted ice cubes, toilet tanks, and canned vegetables.
Clean up spilled medicines, bleaches or gasoline or other flammable liquids immediately.
Leave the area if you smell gas or fumes from other chemicals.