the parking brake. Avoid overpasses，bridges，power lines，signs and other hazards. Stay inside the vehicle until the shaking is over. If a power line falls on the car，stay inside until a trained person removes the wire.

　　If you're by the shore，drop，cover and hold on until the shaking stops. Estimate how long the shaking lasts. If severe shaking lasts 20 seconds or more，immediately evacuate to high ground as a tsunami(海啸)might have been generated by the earthquake：evolve inland 3 kilometers(2 miles)or to land that is at least 30 meters(100 feet)above sea level immediately. Don't wait for officials to issue a warning. Walk quickly，rather than drive，to avoid traffic debris and other hazards.

　　If you live downstream for a dam，you should know flood－zone information and have prepared an evacuation plan. Catastrophic failure is unlikely，but dams can fail during major earthquakes.

　　The main point is to try not to move and to immediately protect yourself as well as possible where you are. Earthquakes occur without any warning and may be so violent that you cannot run or crawl; you therefore will most likely be knocked to the ground where you happen to be. You will never know if the initial jolt will turn out to be start of the big one.

In addition，studies of injuries and deaths caused by earthquakes in the US over the last several decades indicate you are much more likely to be injured by falling or flying objects(TVs，lamps，glass，bookcases