As early as 1970, the State Seismological Bureau, had identified the Liaoning Province as an area of high earthquake risk.
2
然后在1975年2月4日，辽宁省海城市发生7.3级地震。
On February 4, 1975, an earthquake of magnitude 7.3 struck the Haicheng County, Liaoning Province.
3
1975年2月4日，在中国东北辽宁省的海城，一个约有十万居民的镇，发生了7.3级的特大地震。
On February 4, 1975, Haicheng, a town with about 100,000 inhabitants in the Liaoning Province of northeast China, was struck by a 7.3 magnitude earthquake.
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