| 用地震活动度变化特征进行地震序列类型早期划分 |
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| 引用本文： | 徐常辉,周翠英.用地震活动度变化特征进行地震序列类型早期划分[J].华北地震科学,1996,14(1):47-51. |
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| 作者姓名： | 徐常辉 周翠英 |
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| 作者单位： | 山东省潍坊市地震局 261041
(徐常辉)，山东省地震局 济南250021
(周翠英)，山东省地震局 济南250021(王红卫) |
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| 基金项目： | 地震科学联合基金会资助项目(编号91012) |
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| 摘 要： | 本文对我国１９６６－１９９１年全国６级以上地震序列进行研究，发现其早期活动遵从下式：Ｌｎｓ＝ａ－ＫｓＴ。。其中Ｓ为地震活动度，是时间Ｔ的函数，Ｔ以天为单位，以最小二乘法求取上式Ｋｓ值，并以其对序列类型进行划分，Ｋｓ≥０．１４５为主震型，Ｋｓ〈０．１４５为震群型。
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| 关 键 词： | 地震序列 最小二乘法 类型 地震活动性 变化特征 |
DIFFERENTIATE THE TYPES OF SEISMIC SEQUENCES AT EARLY STAGE WITH THE SEISMICITY'S VARYING CHARACTER |
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| XU Changhui.DIFFERENTIATE THE TYPES OF SEISMIC SEQUENCES AT EARLY STAGE WITH THE SEISMICITY''''S VARYING CHARACTER[J].North China Earthquake Sciences,1996,14(1):47-51. |
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| Authors: | XU Changhui |
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| Abstract: | The paper has studied the seismic sequences of magnitude 6 and above in China from 1966 to 1991 and we have found the seismicity at the early stage (3 -7days) follows the following formula:LnS = a-KsTWhere S stands for the seismicity, being the function of T; T stands for the time measured by day; a and Ks are constants. Resolve the constant Ks with least square method and differentiate the types of the seismic sequences with it. A sequence with Ks> = 0. 145 belongs to the type of main earthquake, and a sequence with ks<0. 145 belongs to the type of swarm. Comparing the results with the traditional differentiating results, we have found that about 86 per cent of sequences belong to the same one of the two types in the two ways. This indicates that the Ks may be a better index to differentiate the type of a sequence at the early stage and wecan use it to predict the seismic tendency after a strong shock. |
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| Keywords: | seismic sequence sequence analysis least square method |
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