This study selects six consecutive 18.6 years of global M≥7.0 earthquakes,calculates the lunar declination angle based on the time of the earthquakes,and divides the global earthquakes into 13 research regions accord...This study selects six consecutive 18.6 years of global M≥7.0 earthquakes,calculates the lunar declination angle based on the time of the earthquakes,and divides the global earthquakes into 13 research regions according to the global plate distribution facts to explore the lunar infl uence of earthquakes.The relationship between the lunar declination angle and these earthquakes is analyzed.The analysis results show that when the moon advances to a certain interval of its declination angle,the earthquakes are concentrated in a certain research region,whereas other research regions are relatively calm,providing a scientifi c basis for medium and long-term earthquake predictions in each research region.The 18.6-year cycle is the lunar declination angle change cycle,and it is also the major nutation cycle of the earth’s motion and lunar node movement cycle.This is,in reality,the eff ect of the lunar node tide,which is worthy of further study.展开更多
The pulsar timing residuals induced by gravitational waves from non-evolving single binary sources with general elliptical orbits are analyzed.For different orbital eccentricities,the timing residuals present differen...The pulsar timing residuals induced by gravitational waves from non-evolving single binary sources with general elliptical orbits are analyzed.For different orbital eccentricities,the timing residuals present different properties.The standard deviations of the timing residuals induced by a fixed gravitational wave source are calculated for different values of the eccentricity.We also analyze the timing residuals of PSR J0437-4715 induced by one of the best known single gravitational wave sources,the supermassive black hole binary in the blazar OJ287.展开更多
基金the National Natural Science Foundation of China(No.91736207)。
文摘This study selects six consecutive 18.6 years of global M≥7.0 earthquakes,calculates the lunar declination angle based on the time of the earthquakes,and divides the global earthquakes into 13 research regions according to the global plate distribution facts to explore the lunar infl uence of earthquakes.The relationship between the lunar declination angle and these earthquakes is analyzed.The analysis results show that when the moon advances to a certain interval of its declination angle,the earthquakes are concentrated in a certain research region,whereas other research regions are relatively calm,providing a scientifi c basis for medium and long-term earthquake predictions in each research region.The 18.6-year cycle is the lunar declination angle change cycle,and it is also the major nutation cycle of the earth’s motion and lunar node movement cycle.This is,in reality,the eff ect of the lunar node tide,which is worthy of further study.
基金Supported by the National Natural Science Foundation of China under Grant No 11103024 and the Program of the Light in China’s Western Region of CAS。
文摘The pulsar timing residuals induced by gravitational waves from non-evolving single binary sources with general elliptical orbits are analyzed.For different orbital eccentricities,the timing residuals present different properties.The standard deviations of the timing residuals induced by a fixed gravitational wave source are calculated for different values of the eccentricity.We also analyze the timing residuals of PSR J0437-4715 induced by one of the best known single gravitational wave sources,the supermassive black hole binary in the blazar OJ287.
