May 14, 2008 03: 041 earthquake knowledge Earthquakes are a natural phenomenon, the current column of people still can not prevent earthquakes. However, we can take effective measures to minimize earthquake. Since the earth in constant motion, the gradual accumulation of enormous energy in the earth's crust caused by the formation of certain fragile zones sudden rupture or dislocation, this is an earthquake. Earthquake precursor refers anomalies before the earthquake occurred, such as seismic activity, as well as significant changes in the surface magnetic, electrically, gravity and other geophysical anomaly, groundwater levels, water chemistry, abnormal animal behavior. Seismic intensity are different distances from the epicenter of the ground and buildings, structures subjected to earthquake damage degree. The intensity of the earthquake is divided into 12 degrees. Seismic intensity and magnitude earthquake two concepts, such as Tangshan 7.8 earthquake, Tangshan earthquake intensity is 11 degrees, the intensity of downtown in Tianjin is 8 degrees, Shijiazhuang intensity is 5 degrees. 3 degrees, a few people felt. 4-5 degrees, sleeping man woke up, swinging chandelier. 6 degrees containers dumping, housing minor damage. 7-8 degrees, houses destroyed, the ground cracks. 9-10 degrees, bridges, dams damaged houses collapsed and severely damage the ground. 11-12 degrees devastation. 2. The occurrence of felt earthquakes emergency operations Felt earthquakes refers to a lower level earthquake occurred, clearly felt the earthquake caused no major damage and destruction. Emergency Points Felt earthquakes occurred, the person in the room at the moment the earthquake made without knowing the strength of the earthquake, the press should be quickly preselected safer indoor suspension points separately to avoid. After the earthquake quickly evacuated to the outside, pay attention to listen to, watch television and radio stations broadcast about the news, do earthquake preparation. Learn earthquake trends, do not listen, spread rumors, to ensure social stability. 3. devastating earthquake emergency action It refers to a large destructive earthquake earthquake level, causing some casualties and building damage or cause significant casualties and damage to buildings earthquake. Emergency Points When bungalow residents experiencing greater levels of earthquakes, such as the open air, should quickly ran outside to escape, try to avoid tall buildings, overpasses, power lines and stay away from chemical and gas plants or facilities; no time to run to hide in the table when next, the bed and sturdy furniture, and cover your mouth dust, smoke with a towel or clothing. Residents living in the building, should choose a kitchen, bathroom and other small bay space shock; to be hiding inside the wall beside, corner, sturdy furniture is easy to form a triangular space areas; to stay away from exterior walls, windows, doors and balconies; Do not use the elevator, but can not jump. Turn off the power as soon as possible, sources of ignition. Are classrooms, workplaces, public places when activity should be promptly Baotou, eyes closed, at the podium, desks, tables and office furniture and other shelter below. Are outdoor activities, they should try to avoid the foot of the cliffs, the Rolling Stones and prevent landslides; in case of landslides, the Rolling Stones would like to stay away from the forward direction on both sides of the direction of running. When is the beach to play, should quickly away from the beach, in case a tsunami caused by an earthquake. When traveling by car, you should quickly escape overpass, cliffs, poles, etc., and select the open air immediately stopped as soon as possible. When the body was earthquake damage, it should seek to remove pressure on the body of the object, cover your mouth as dust, smoke with a wet towel; tap with stones or iron and other objects with the outside world, not shouted for help, attention save energy; try to use over the support of heavy masonry and other unstable to protect their living space. 4. Earthquake avoid panic We felt the earthquake, most felt, felt a strong earthquake, a few can cause slight damage, causing serious damage to the earthquake is very few. Thus, when an earthquake should not panic, be calm, take prompt corrective action. Especially in high-rise buildings and crowded places, the best place to escape reality. China has been the earthquake did not cause any damage, but frightened people each lesson Stampede cause serious injury or even death. Do not jump off To care for each other Crowded places not crowded Students will obey