China's earthquake history has a long history,
rich, but the early record of general, and many missing.
From the 6th century to the 14th century, the record of destructive earthquakes,
an average of only 3 to 4 times every 50 years, after the 14th century AD,
local chronicles prevailed, the earthquake records gradually improved,
the number of recorded earthquakes increased significantly.
From the Chinese seismic zone distribution map can be seen that
China's seismic belt and mountain movements are closely related
to the mountain crustal plate movement is formed by squeezing each other,
the earth's crust movement is the release of energy natural phenomena,
the demise of boundaries between the plates,
the formation of earthquakes Active seismic belt.
Understanding the distribution of seismic zones in China,
can be found from the mountain range of our association.
China's seismic belt in the Pacific plate, the Indian plate,
the Philippine Sea plate and the Eurasian plate interaction area,
coupled with the Eurasian plate deep earth dynamics,
the great late Quaternary active fault is developed,
and these faults Is a hotbed of the earthquake. Historically,
almost all of the 8 magnitude and 80-90% strong earthquakes in the
Chinese mainland have occurred on these faults.
Source: Atlas of China's Natural Disaster System