Modern scientific uses. Seismology. A seismic disturbance of a portion of the crust or surface of the earth, travelling continuously for a…
| 单词 | θ5064 |
| 释义 | the world > the earth > structure of the earth > formation of features > convulsion > [noun] > earthquake > seismic wave (6) wave1761 Modern scientific uses. Seismology. A seismic disturbance of a portion of the crust or surface of the earth, travelling continuously for a… earth wave1848 a seismic wave. body wave1900 Seismology. A seismic wave that travels through the earth rather than over its surface. Cf. P wave at P, n. 6, S wave at S, n.1 6. Contrasted with su… S wave1908 Used, chiefly in S wave, to denote an earthquake wave which oscillates transversely to the direction of propagation, a shear wave; so named… shear wave1936 an elastic wave which vibrates transversely to the direction of propagation; an S-wave. shake wave1944 = S wave at S, n.1 6. |
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