| 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。 |
| 关键词: 前震 主震 震级差 云南地区 |
| DOI： |
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| 基金项目: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 |
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| Spatial-temporal distribution and their statistical characteristicsof foreshocks in the Yunnan region |
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Zhao Xiaoyan, Sun Nan, Su Youjin
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Earthquake Administration of Yunnan Province，Kunming 650224，China
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| Abstract: |
| The 223 earthquakes with M≥5． 0 in the Yunnan region during 1965 ～ 2014 wereanalyzed． Among them，74 earthquakes have foreshocks ( about 33． 2% ) ． There is greatdifference between different structures: the Lancang-Gengma and Tengchong-Baoshan block havethe most abundant foreshocks in the Yunnan region; the predominant magnitude difference，timeinterval and spatial distance are 0.5 ～ 2.9，within 10 days and within 20km respectively． We canuse those characteristics to forecast the mainshock after the identification of a foreshock． |
| Key words: The Yunnan region Foreshock Mainshock Magnitude difference |
