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序言 阿拉斯加南部以及阿拉斯加半岛是北美大陆的最大地震区。从单个地震的次数及其能量来看,阿留申群岛一带地震活动也是很显著的。然而,整个这一带的地震活动不像勘察加东部-勘察加东南部-千岛群岛-北海道地区那样高。另一方面,也值得注意的是,如果沿阿留申深海沟轴部从东往西,在180°子午线以西,地震能级突然降低,而在勘察加沿岸附近地震能级又重新增高。在阿拉斯加半岛和阿留申群岛可发现许多活火山;但是火山山脉在东经176°上突然终止。往西,在勘察加发现了一些距离最近的活火山。
Preamble Southern Alaska and the Alaskan Peninsula are the largest quakes in North America. From the number of single earthquakes and their energy, the seismic activity in the Aleutian Islands is also significant. However, the seismic activity throughout the area is not as high as that of the survey plus the eastern part of the survey - southeastern part of the Kuril Islands - Hokkaido area. On the other hand, it is also worth noting that if the axis of the Aleutian deep trench goes west to east and the west of the 180 ° meridian, the seismic energy level suddenly drops, while the seismic energy levels increase again near the coast of the survey plus. Many active volcanoes can be found in the Alaskan Peninsula and the Aleutian Islands; however, the volcanic mountain range suddenly terminates at 176 ° East. Farther west, some of the more recent active volcanoes were discovered in the survey.