Study on the Genesis of the Yongsheng Earthquake with Ms6.0 on October 27, 2001     

Zhou Guangquan  Su Youjin  Wang Shaojin 《中国地震研究》2003,17(4):364-375

On October 27, 2001, a large earthquake with Ms6.0, named the Yongsheng earthquake, occurred along the Jinshajiang segment of Chenghai fault in Yongsheng County, Yuunan Province. It is the largest event to occur along the Chenghai fault in the last 200 years. The seismo-geological survey shows that the seismogenic fault, which is the Jinshajiang segment of Chenghal fault, takes left-lateral strike-slip as its dominant movement pattern. According to differences in vertical motion, motion time, landforms and scales, the Chenhai fault can be divided into eight segments. The Jinshajiang segment has a vertical dislocation rate of 0.4mm/a, far lower than the mean rate of the Chenghai fault, about 2.0 mm/a. It‘ s deduced that the two sides of Jinshajiang segment “stuck“ tightly and hindered the strike-slip of the Chenghai fault. The strong earthquake distribution before this event shows that the Jinshajiang segment was in the seismic gap. The Chenghai fault, as a boundary of tectonic sub-blocks, makes the Northwest Yunnan block and the Middle Yunnan block move clockwise, and their margins move oppositely along the Chenghai fault. In the motion process of the Chenghai fault, structural hindrance and the seismic gap of strong earthquakes are propitious to the concentration and accumulation of structure stress. As a result, the Yongsheng Ms6.0 earthquake occurred. The Sujiazhuang-Shangangfu segment is similar to the Jinshajiang segment with a low vertical motion rate of 0.3 mm/a and in the seismic gap. So it‘s postulated that the segment may become a new structure hindrance, and the Yongsheng Ms6.0 earthquake may trigger the occurrence of future large earthquakes along this segment.  相似文献   

A　Nonlinear　Time－lag　Differential　Equation　Model　for　Predicting　Monthly　Precipitation     

彭永清  严绍谨  王同美 《大气科学进展》1995,(3)

彭永清，严绍谨，王同美ＡＮｏｎｌｉｎｅａｒＴｉｍｅ－ｌａｇＤｉｆｆｅｒｅｎｔｉａｌＥｑｕａｔｉｏｎＭｄｅｌｆｏｒＰｒｅｄｉｃｔｉｎｇＭｏｎｔｈｌｙＰｒｅｃｉｐｉｔａｔｉｏｎ￥ＰｅｎｓＹｏｎｓｑｉｎｇ；ＹａｎＳｈａｏｊｉｎａｎｄＷａｎｇＴｏｎｇｍｅｉ（...  相似文献   

从混沌时间序列中测量Lyapunov指数谱   总被引：2，自引：0，他引：2  

严绍瑾  彭永清 《南京气象学院学报》1992,15(1):47-56

  相似文献   

从一维气候时间序列直接提取K熵及其可预报时间的估计   总被引：2，自引：0，他引：2  

朱育峰  彭永清 《南京气象学院学报》1994,17(3):347-350

对广州１９０８－１９８０年的月平均气温资料，在延拓的ｎ维相空间中直接提取Ｋ熵，得到该序列的Ｋ熵值为０．１８１９，由此得到，月平均气温的平均可预报时间Ｔ－１／Ｋ，约为６个月。  相似文献   

利用─维时间序列重建动力系统的进一步研究     

朱育峰  彭永清  严绍瑾 《南京气象学院学报》1994,(4)

对月平均气温一维时间序列作相空间拓展，并根据系统的分维数设定重建的动力系统，且在具有二次非线性项的假定下，利用最小二乘法求解相空间状态演化方程中的各项系数，以重建动力系统。结果表明：随相空间维数的增加，重建的动力系统对气候演化过程可作出更精确、细致的描述。  相似文献   

Seasonal Variation Features of Western North Pacific Tropical Cyclone Tracks with Their Predictability     

Peng Yongqing  Yan Shaojin 《大气科学进展》1994,11(4):463-469

Analysis is done of monthly and seasonal variations as climatic features of the tracks from 1196 tropical cyclones originating in the western North Pacific over the period 1949 to 1980, followed by the investigation of 301 onland cyclone tracks over China mainland in terms of methodology for nonlinear system. Obtained by computing the accumulated distance distribution function of the tracks Cm (l) is the characteristic chaos quantity for the related dynamic systems and then the fractual dimensionality d = 4.86 and Kolmogorov entropy approximation K2 = 0.0164, thereby leading to the predictability time scale = 2.54 days. It is found that the reference path among the onland typhoon No.23 of 1971, or Bess in the international nomenclature. Our results could be of operational use as a kind of reference.  相似文献   

吉林省南部下元古界的变质不纯碳酸盐岩     

颜耀阳  张翊钧 《吉林地质》1990,9(4):34-39

吉林省南部下元古界集安群、老岭群不纯碳酸盐岩发生变质反应时流体成分的变化受不同因素的控制,集安群不纯碳酸盐岩中流体成分的变化受缓冲作用控制,老岭群不纯碳酸盐岩中流体成分的变化受缓冲加渗滤作用控制;变质温压条件为560℃±、300MPa±。  相似文献   

开平煤田构造发育规律对煤层赋存的影响     

闫庆磊  朱炎铭  袁伟  王辉 《中国煤炭地质》2009,(12):38-41

依据开平煤田地质勘查和矿井开采资料,并结合前人的研究成果,在系统分析地质构造展布规律和组合特征的基础上,选取NW向剖面作为平衡剖面,采用平衡剖面方法,对煤田构造变形及其对煤层赋存影响进行了研究。研究表明：开平煤田标志层缩短率为e=～23．5％,地层变形程度总体自NW—SE减弱;唐山推覆构造巾间后屯断层与FV断层所夹岩体变形更为强烈,缩短率达到42．9％;开平向斜NW翼地层陡倾甚至倒转,煤层韧性流变和脆性流变广泛发育,唐山矿FⅢ断层上部煤层形成不协调褶皱,局部煤层形成煤仓。  相似文献   

腾冲火山活动构造动力学研究   总被引：7，自引：1，他引：6  

姜朝松  王绍晋  周瑞琦  周真恒  龙晓帆  王瑜 《地震研究》2000,23(2):179-187

利用腾冲火山区域 (10°～ 35°N ,90°～ 10 6°E) 1990～ 1998年 6 6 0个地震基本参数和震源机制资料 ,以及原先已作过 370多个强震震源参数资料[1 ] ,并结合本区域的地质资料 ,对本区的火山作用的构造动力学以及腾冲火山与印度、欧亚两大板块的关系作了探讨。研究表明 ,腾冲火山区西侧的印度板块对缅甸板块和包括腾冲在内的滇缅泰板块作用 ,大致在 0～ 10 0km作用机制表现为斜俯冲 ,10 0km以下表现为碰撞挤压作用。分析还表明 ,腾冲火山的形成与活动 ,与印度板块和亚欧板块两个大陆板块俯冲、碰撞 ,及在缅甸那加山、阿拉干山板块缝合线产生的斜俯冲和侧面挤压剪切作用密切相关 ,它应该属于两个大陆板块碰撞型板缘火山。  相似文献   

锯缘青蟹秋苗土池越冬的试验研究   总被引：4，自引：0，他引：4  

王桂忠  林琼武 《台湾海峡》1998,17(4):468-472

本文报道１９９３和１９９４年秋季作者培育的部分锯缘青蟹仔蟹苗土池越冬试验。结果表明人工培育的青蟹苗在闽南地区的自然条件下,可以在室外土池完全越科,成活率可达６０－８０％,水温是影响青蟹生命活动的主要因素;由于越冬期间青蟹营养积累不足,导致难以顺利地完成越冬后的第一次生长蜕壳,造成大量死亡,这是影响青蟹越冬存活率的主要因素之一;越科后期病死青蟹肝胰组织进行涂片处理,发现６只受检蟹中２只肝胰组织中有日  相似文献