虽然美国中部和东部普遍被认为是个板内构造稳定区,但有史以来许多大地震发生在这里。最主要是(1)1811—1812年密苏里州新马德里地震;(2)南卡罗来纳州1886年查尔斯顿地震;(3)1638年和1775年,马萨诸塞州安角外地震;(4)1663年和1925年圣劳伦斯河谷地震;(5)1929年新斯科舍滨外大班克斯地震。如果要在可靠的地质基础上评价美国中部和东部的地震灾害,就需要了解造成这 Although the central and eastern parts of the United States are generally considered as intraplate structurally stable areas, many major earthquakes have taken place here. The most important are (1) the Earthquake of New Madrid, Missouri, 1811-1812; (2) the 1886 Charleston Earthquake in South Carolina; (3) the extraterritorial Anguilla out of Massachusetts in 1638 and 1775; (4) 1925 St. Lawrence Valley earthquake; (5) 1929 Nova Scotia off the Great Banks Earthquake. If we are to evaluate the earthquake disaster in the central and eastern United States on a reliable geological basis, we need to understand the