1.1. The Ruinous Earthquakes
As one of the major natural disasters, earthquake disaster has been a constant threat to human survival and
development since ancient times. Strong earthquakes cause the collapse of building facilities, and will also
induce landslides, and cracks, sandblasting, and other phenomenon, leading to casualties and economic losses.
And the devastating earthquake also can trigger fires, floods, tsunamis, landslides and bust up the lifeline of
human race, such as urban pipelines and transportation projects, which cause secondary disasters. The
earthquake disaster monitoring and forecasting has been an important subject of scientist. In 1975, due to the
success of earthquake prediction, the number of casualties in the earthquake with magnate of 7.3 was the total
number of 0.32 percent in densely populated areas of the Haicheng, the success of the prediction shocked the
entire world. Accreditation by the UNESCO, China as the sole right to make earthquake forecasting short-term
success of the country, was recorded in history. Haicheng earthquake successful prediction mainly rooted in the
importance of observation. This shows that earthquake monitoring and forecasting to reduce the losses caused
by earthquake disaster was great practical significance.