Science. 1980 Dec 19;210(4476):1343-5. doi: 10.1126/science.210.4476.1343.
Historical documents indicate that great earthquakes ruptured at least a 500-kilometer-long segment of the plate boundary near the Alaska Peninsula in 1788 and 1847. At least half of a major seismic gap in the Shumagin Islands ruptured during those shocks but has not experienced a great earthquake for at least 77 years. Large shocks along this and other plate boundaries occur in bursts followed by several decades during which there is very little energy release.
历史文献表明，1788 年和 1847 年，在阿拉斯加半岛附近的板块边界上，至少有一段 500 公里长的地段发生了大地震。在这些震动中，舒马金群岛的一个主要地震间隙至少有一半发生了破裂，但至少 77 年来没有发生过大地震。沿着这条和其他板块边界的大型地震以爆发的形式发生，然后是几十年的时间，几乎没有能量释放。
