摘要
应用形态法、差分法、契氏拟合法对１９８４—１９９５年门源倾斜的资料做了系统的分析、总结，对其２００ｋｍ范围内的中强地震的震前异常进行了分析，发现在１９８６年门源６．４级、１９９０年共和７．０级地震前趋势性异常比较显著，且异常幅度大、持续时间长，而在一些５级左右地震前异常不明显。并且发现在中强地震前门源倾斜ＮＳ向有一个减速过程，这似与以往总结的震例有所区别。并在此基础上对门源倾斜的映震能力作了评价，且提出了未来一个时期的地震趋势。
By using morphologic method, differential method and Qi's fitting method, the authors analyse and summarize the ground tilt data of Menyuan areafrom 1984 to 1995, especially analyse the pre-earthquake anomalies of moderate-strong earthquakes within 200km area.The results show that there are some abvious trend anomalies of large anomalous amplitude and long duration time before Menyuan earthquake with Ms 6.4 in 1986 and Gonghe earthquake with Ms 7.0 in 1990. But the anomalies are not obvious before the earthquakes with Ms 5.0. A process of retarded velocity is also found before moderate-strong earthquakes which is different from other events. Based on above, the authors estimate the reflecting earthquake ability of Menyuan ground tilt and put forward the earthquake trend in the coming future.
出处
《高原地震》
1996年第4期33-39,共7页
Plateau Earthquake Research
关键词
形态法
差分法
契氏拟合法
趋势异常
异常幅度
异常持续时间
映震能力
Morphologic method
Differential method
Qi 's fitting method Trend anomaly
Anomalous amplitude
Anomaly duration time Reflecting earthquake ability
