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Japan's Earthquake Research Committee estimates Friday's devastating earthquake forced the tectonic plate on which Japan sits to spring eastward by about 20m (66 feet), says NHK.
Originally posted by chr0naut
OK, the techtonic plate under the Pacific is slipping underneath (subducting) the Eurasian plate.
The vibration of the earthquake has caused the islands of Japan and the surrounding land surface (even under the ocean) to flatten out slightly. Think of sand in a tray, you shake the tray and all the bumps and irregularities "smooth out" a bit. This made the area that shook, in a rough circle around the fault, move south-westward by a bit.
The moon has been moving away from the Earth for millions of years and this should not actually make any significant change to that, although it may also affect the tilt and rotation of the moon a little. Actually, ignore that, I have just done some quick calcs and any changes to the moon's rotation or tilt would be infinitessimally small.
According to the law of universal gravitation, the attractive force (F) between two bodies is proportional to the product of their masses (m1 and m2), and inversely proportional to the square of the distance (r) between them:...