摘要
分析了1965~2014年发生在云南地区的共计223次M≥5.0地震,发现其中有前震的地震74次,占33.2%;云南不同构造区前震的比例差异较大,前震较多的地区是澜沧-耿马地块和腾冲-保山地块;前震与主震的震级差、时间间隔、空间距离优势分布分别为0.5~2.9、10天内和20km内,可以利用这些特点在识别出前震后进而对后续主震做出预测。
The 223 earthquakes with M ≥5. 0 in the Yunnan region during 1965 ~ 2014 were analyzed. Among them,74 earthquakes have foreshocks（ about 33. 2%）. There is great difference between different structures： the Lancang-Gengma and Tengchong-Baoshan block have the most abundant foreshocks in the Yunnan region; the predominant magnitude difference,time interval and spatial distance are 0. 5 ~ 2. 9,within 10 days and within 20 km respectively. We can use those characteristics to forecast the mainshock after the identification of a foreshock.
出处
《中国地震》
北大核心
2015年第2期209-217,共9页
Earthquake Research in China
基金
云南省地震局继续深入推进预防和处置地震灾害能力建设10项重点工程"前震及其识别技术研究"资助
关键词
前震
主震
震级差
云南地区
The Yunnan region Foreshock Mainshock Magnitude difference
