The magnitude of this earthquake has been estimated to be from 8.0 to 8.3 on the Richter scale.
据估计,这次地震为里氏8.0到8.3级。
In the 1970s, California's Oroville Dam may have contributed to an earthquake of magnitude of 5.7 on the Richter scale.
20世纪70年代,加利福尼亚州的奥罗维多大坝可能促成了里氏5.7级的地震。
The Great Peruvian Earthquake hit the coastal town of Chimbote, Peru on May31, 1970 —measuring a 7.9 magnitude on the Richter scale.
1970年五月三十一日,秘鲁沿海城市钦博特发生了里氏7.9级的大地震。
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