| 强震发生前中小地震活动特征的初步研究 |
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| 引用本文： | 赵小茂,景北科,戴王强,任隽,李永辉.强震发生前中小地震活动特征的初步研究[J].内陆地震,2004,18(1):72-76. |
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| 作者姓名： | 赵小茂 景北科 戴王强 任隽 李永辉 |
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| 作者单位： | 陕西省地震局,陕西,西安,710068 |
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| 基金项目： | 国家科技攻关项目2001BA601B01-03-05. |
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| 摘 要： | 针对西北地区4次6级强震前一定范围内中小地震活动进行分析，得出在强震发生前中小地震的活动有两个不同的时段：(1)中小地震频次高、分布有序性低的A时段和中小地震频次低、分布有序性高的B时段；(2)中小地震的活动在某些方位上呈现优势分布。对上述现象产生的原因进行了粗浅的讨论。
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| 关 键 词： | 西北地区 中小地震 分布有序性 |
| 文章编号： | 1001-8956(2004)01-0072-05 |
| 修稿时间： | 2003年9月1日 |
THE PRELIMINARY RESEARCH OF MID-SMALL EARTHQUAKE ACTIVITIES BEFORE STRONG EARTHQUAKES |
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| ZHAO Xiao-mao,JING Bei-ke,DAI Wang-qiang,REN Jun,Li Yong-hui.THE PRELIMINARY RESEARCH OF MID-SMALL EARTHQUAKE ACTIVITIES BEFORE STRONG EARTHQUAKES[J].Inland Earthquake,2004,18(1):72-76. |
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| Authors: | ZHAO Xiao-mao JING Bei-ke DAI Wang-qiang REN Jun Li Yong-hui |
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| Abstract: | By ananlyzing the activities of mid-small earthquakes in certain region before 4 strong earthquakes with M_S6 in northwest area, we obtain that the activities of mid-small earthquakes have two different time-segment before the strong earthquake occurred. (1) The A time-segment is that the frequency of mid-small earthquakes is high, the order of their distribution is low. While the B time-segment is that the former is low, the latter is high.(2) The activities of mid-small earthquakes appeared dominant distribution in some directions. We discussed simply the reason of appearing the above-mentioned phenomenon. |
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| Keywords: | The northwest area The mid-small earthquake The order of the distribution |
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