RELATIONSHIP BETWEEN CHANGE OF EARTH ROTATION
RATE AND EARTHQUAKES
1)School of Geodesy and Geomatics, Wuhan University, Wuhan 430079
2)Key Laboratory of Geospace Environment and Geodesy, Ministry of Education,
Wuhan University,Wuhan 430079
Abstract The effects of earth rotation rate change on earthquakes were analized based on the earthquakes that are bigger than Richter scales 7.0 duaring the period of January 1st, 1973 and December 30th, 2012 around the world with LOD data from IERS. At the same time, the definitions of discrete function derivative and R were introduced to assess the seismic activity. The results indicate: 1) The probability of earthquake occuring at extreme points and zerovalue point is much larger than the probability of stochastic theory, which shows that rapid change or the rechange period of negative and positive values of earth rotation rate would induce earthquakes. 2) The seismicity presents yearly period and nearly 6 500day period, which corresponds with LOD’s annual period and 18.6year period. These results have significant value in understanding and prediction of earthquakes.