摘要
中国近五千年来山崩滑坡地裂等地质灾害事件存在着多种时间尺度的群发期。最显著的群发期出现在中国黄帝、夏桀、殷代、周代、西汉、东汉、西晋、元代、明清、清末时期。近８００起灾害事件时间序列谱分析表明，多尺度群发周期序列为１３８０，６００，２８８，１６２，１１８，７２，６１，３１，２４，２０，１５，１１年，具有可公度性和对数螺线性，并且与冰川泥石流、火山爆发、陨石坠落等周期序列相近，与地球运动周期、气候旋回、地质旋回一致。
This paper discusses the characteristics of synchronism and quasi-periods of the mountain avalanche,landslide, and ground collapse events by many time scales during the past 5000 y6ars in China and points outthat the predominant periods occurred approximately in the ten stages, that is: 2600 ￣2500 a B' C, 1 830 1 760aB.C, 1 220-1 030 a B. C, 780-580 a B' C, 90-0 a B' of 100-200 a A' D, 240-330 a A' D, 1 310-1370 a A. D, 1 470-1 670 a A. D, 1 820-1 90D a A' D' By means of POwer spectrum and maximum entropy spectrum of nearly 800 hazard events, the synchronous periods (years) of rock avalanches, landslidesand ground collapses have been obtained as following: 1 3801 47. 5, 600. 5 1 5. 97, 288. 5 t 6. 15, 161. 9 12. 98, 117. 8t7. 85 1 72. 410. 73, 60. 911. 32, 30. 8t3. 8, 24. 3t0. 28, 19. 6ti. 06, 15. 110. 31, 11. Zto. is. They correspond to the periods of glacier debris-now, volcanic eruption and falling meteorite, whichare in accordance with the periods of Earth's rotation, climatic cycle and geologic cycle and are of logarithmspiral nature as well as commensurability.
