“epifocal”的英文意思

单词

epifocal

释义

epifocal, a. Geol.|ɛpɪˈfəʊkəl|
[See epi- 1.]
Situated above the focus of an earthquake.
1898J. Milne Seismology x. 195 Mallet's well known method..might..outside an epifocal area, be equally well used for the..determination of the maximum slopes of surface waves.1902Encycl. Brit. XXVII. 608/1 Causes which should produce magnetic effects within an epifocal district.1910Ibid. VIII. 817/2 (Earthquake) That part of the surface of the earth which is vertically above the centre is called the epicentre; or, if of considerable area, the epicentral or epifocal tract.

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