Yunnan and Sichuan, the strong characteristics of seismic activity
≥ 6 earthquakes. Yunnan in the four activity periods , the first and third shorter , respectively, 8 and 7 years , less saddle earthquakes , M ≥ 6 earthquakes were 5 and 7 times the average annual rates were 0 . 6 and 1.0. 2nd and 4th 's more , respect...
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