Abstract: This paper points out that the occurrences of earthquakes are stemed from the motion of 10 kinds of spiratrons and their efiects. The block motion is the result of an earthquake, but not the reason. The earthquake is caused by the fission of weight metal minerals.The auther suggests a law for the balance of gravitational potential of the earth surface, that is, the distribution of the gravitational potential all over the earth surface must keep balance so as to be without harm to the rotation of the earth. There are some regions around the large mountains, The seacoasts, and the sea trenches, where the radioactive weight metal minerals eliminate the suddan change of gravitaioaal potential. On the basis of the unichor theory, the author has calculated the earhtquake magni tudes, earthquake intensities, and earthquake epicentres; and modified the old formulas pointed out above. The author gives he unichor spiral-coordinate of point, line and plant the mometum formulas of 5 kinds of evospirotron; and the formulas of earthquake energy.