7 are processed, the PSD of Earth free oscillation is obtained.
7级大地震数据进行处理，获得地球自由振荡的功率谱密度。
The earth free oscillation can be used to constrain structure of the earth interior, including velocity, discontinuity as well as density distribution.
用地球的自由振荡研究地球内部结构、速度间断面、密度分布等具有射线理论不可替代的优点。
The earth free oscillation can be used to constrain structure of the earth interior, including velocity, discontinuity as well as density distribution.
用地球的自由振荡研究地球内部结构、速度间断面、密度分布等具有射线理论不可替代的优点。
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