南美板块包括南美洲和南大西洋的西部。其东以大西洋中脊的南段与非洲板块相邻，西界则是南美滨太平洋的智利（或阿塔卡玛）深海沟，北与加勒比板块相接，以南则沿转换断层与南极洲板块毗邻。
由于智利位于太平洋板块以及南美板块交界处，地震风险极高。
Chile is at a high risk of earthquakes because it lies on the boundary between the Pacific and South American tectonic plates.
但是这被南美板块的隆起将加勒比板块推下所全部抵消。
But this is countered by the hump of s America pushing the Caribbean Plate down, overall.
这次巨大的摇晃发生在纳斯卡板块下移，向南美板块下的近陆移动。
This huge jolt happened as the Nazca plate moved down and landward below the South American plate.
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