The Intermountain West region of the United States extends from the eastern margin of the Sierra Nevada and Cascade Mountains in the west to the Rocky Mountains in the east. The region is characterized by dextral shear along the eastern margin of the Sierra Nevada and nearly east–west extension in the Basin and Range. This region experienced four significant earthquake sequences in the first half of 2020. The most significant mainshocks were the 18 March 2020 Mw 5.7 earthquake north of Magna, Utah (a suburb of Salt Lake City), the 31 March 2020 Mw 6.5 earthquake northwest of...

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2020年西部山间地震重点部分的序言

美国的西部山间地区从内华达山脉的东部边缘和西部的喀斯喀特山脉一直延伸到东部的落基山脉。该地区的特征是沿内华达山脉东缘的右旋剪切和盆地和山脉近东向西的延伸。该地区在2020年上半年经历了四次重大地震序列。最主要的主震是2020年3月18日在犹他州麦格纳以北（盐湖城的郊区）发生的5.7兆瓦地震，以及2020年3月31日在西北的6.5兆瓦地震。 ..