首页|期刊导航|中国地震研究（英文版）|Study on Statistical Features About Weak Earthquake Activity Before Moderately Strong Earthquakes in the Middle Northern Part of the Qinghai-Xizang (Tibet) Block
中国地震研究（英文版）2006，Vol.20Issue(2)：148-158,11.
Study on Statistical Features About Weak Earthquake Activity Before Moderately Strong Earthquakes in the Middle Northern Part of the Qinghai-Xizang (Tibet) Block
Study on Statistical Features About Weak Earthquake Activity Before Moderately Strong Earthquakes in the Middle Northern Part of the Qinghai-Xizang (Tibet) Block
摘要
Abstract
In regards to the earthquakes recording M ≥ 5.0 that occurred in middle northern part of the Qinghai-Xizang (Tibet) Block from 1970 ～ 2003, in this study we describe the temporal and spatial centralization features of the weak earthquakes and the enhancement and anomalous quiescence of their seismic activity before main shocks through 4 parameters, which are basically not correlated: earthquake time centralization degree parameter Ct, earthquake space centralization degree parameter Cd, η value and weak earthquake frequency and so on. On the basis of calculation results, it has been seen that before earthquakes with M ≥ 5.0 took place in the middle northern part of the Qinghai-Xizang (Tibet) Block, the frequency of weak earthquakes often shows ascent and drop, their strength shows an obvious enhancement and the centralization distribution with time and space is evident.关键词
The middle northern part of the Qinghai-Xizang (Tibet) Block/Weak earthquake activity/Statistical studyKey words
The middle northern part of the Qinghai-Xizang (Tibet) Block/Weak earthquake activity/Statistical study分类
天文与地球科学引用本文复制引用
Ma Heqing,Sheng Juqing,Zhao Weiming,Ren Xuemei,Jin Chunhua..Study on Statistical Features About Weak Earthquake Activity Before Moderately Strong Earthquakes in the Middle Northern Part of the Qinghai-Xizang (Tibet) Block[J].中国地震研究（英文版）,2006,20(2):148-158,11.基金项目
The research was supported by the 10th Five-Year National Key Technologies R&D Program under the project number 2001BA601B01-03-04. （）
