| 地震活动因子A值在丽江7.0、宁蒗6.2、永胜6.0级三次地震前异常变化特征 |
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| 引用本文： | 李丽清,李群,和国文.地震活动因子A值在丽江7.0、宁蒗6.2、永胜6.0级三次地震前异常变化特征[J].四川地震,2005(2):32-34,44. |
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| 作者姓名： | 李丽清 李群 和国文 |
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| 作者单位： | 云南省丽江市地震局,云南,丽江,674100 |
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| 摘 要： | 引用地震活动因子A值作为基本参量，对1996年丽江7．0、1998年宁蒗6．2、2001年永胜6．0级地震前一年间的M≥3．0级地震资料进行空间扫描，并采用动态跟踪方法，结果发现，三次地震前一年左右，震中周围A值均出现高值异常，并且震前1-2月异常区域面积都明显扩展．因此根据异常面积明显扩展可对M≥6．0级地震进行短临预测。此外，当有多个强震孕育时，常常会有多个异常区出现，因此，当出现多个异常区时，要警惕其后强震的连发。
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| 关 键 词： | 地震活动因子 地震活动 异常变化 |
| 文章编号： | 1001-8115(2005)02-0032-03 |
Application of Seismicicty factor A-value to the three earthquakes: Lijiang 7.0, Ninglang 6.2 and Yongshen 6.0 |
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| LI Li-qing,LI Qun,HE Guo-wen.Application of Seismicicty factor A-value to the three earthquakes: Lijiang 7.0, Ninglang 6.2 and Yongshen 6.0[J].Earthquake Research in Sichuan,2005(2):32-34,44. |
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| Authors: | LI Li-qing LI Qun HE Guo-wen |
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| Abstract: | As an index, the seismicity factor A-value were used to scan the whole year within the magnitude equal to or greater than M3.0 class before Lijiang 7.0, Ninglan 6.2 and Yongshen 6.0 earthquakes respectively occurred in 1996, 1998 and 2001. Our scanning result shows that about a year before these three earthquakes, there is a hign value abnormal area around the epicenter region. And 1-2 months before earthquakes, the area of the abnormal A-value gets bigger and so based on the abnormal area with A-value abnormal factor, an M6.0 earthquake may happen. Addition to these indexes, several abnormal areas may suggest several of middle and strong earthquakes around. |
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| Keywords: | seismicity factor abnormal change earthquake forecast |
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