单词 | moonquake |
释义 | moonquaken. Astronomy. A seismic tremor of the moon's surface. (In quot. 1940 poetic.)Seismic activity on the moon occurs in two layers of the crust, weak moonquakes occurring at depths of approx. 800–1000 km (500–620 miles) beneath the surface, and stronger ones at approx. 50–300 km (30–190 miles). ΘΚΠ the world > the universe > planet > primary planet > moon > [noun] > quake moonquake1906 1906 Salt Lake Tribune 4 Feb. 5/2 A moonquake is now unthinkable because the moon is as dead as a door nail. 1928 E. L. Bell in Amazing Stories Q. Winter 41 The moonquake will be of indeterminable duration... The severity of the shocks will about dislodge the mountains and it is almost certain that the undermined parts of the ranges will cave in. 1940 R. Graves No more Ghosts 41 The pallid sky heaved with a moon-quake. 1953 Jrnl. Brit. Interplanetary Soc. 12 66 The work which such an expedition could do is then described: amongst other things, artificial ‘moon~quakes’ would be set off by explosives, so that seismic records could be made. 1968 Observer 29 Dec. 17/3 The astronauts will place on the surface an instrument to register moonquakes. 1973 Telegraph (Brisbane) 13 Mar. 14/1 A seismologist has said that for some mysterious reason almost all moonquakes occur only in two separate belts on the moon. 1991 C. A. Ronan Nat. Hist. Universe 136/2 Deep moonquakes have been recorded in the molten (outer) core. This entry has been updated (OED Third Edition, December 2002; most recently modified version published online March 2022). < n.1906 |
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