| 1985年8月23日新疆乌恰地震6.7级强余震频谱分析 |
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| 引用本文： | 林学文,王兰民.1985年8月23日新疆乌恰地震6.7级强余震频谱分析[J].西北地震学报,1987,9(1):42-47. |
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| 作者姓名： | 林学文 王兰民 |
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| 作者单位： | 国家地震局兰州地震研究所
(林学文)，国家地震局兰州地震研究所(王兰民) |
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| 摘 要： | 在1985年8月23日新疆乌恰7.4级地震后二十天,即9月12日04点45分53秒发生了一次6.7级的强余震,在距微观震中约4公里处获得了强震记录。其最大水平向加速度值为123.8伽,是最大竖向加速度值的四倍。这次地震的反应谱峰值周期比海城、唐山、松潘地震都长。因此,虽然在微观震中处地震动强度相当于烈度7°,但震害却仅是6°。
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THE ANALYSIS OF FREQUENCY-SPECTRUM OF THE STRONG AFTERSHOCK (M=6.7) AFTER WUQIA EARTHQUAKE ON AUG. 23, 1985 IN XINJIANG |
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| Lin Xuewen and Wang Lanmin.THE ANALYSIS OF FREQUENCY-SPECTRUM OF THE STRONG AFTERSHOCK (M=6.7) AFTER WUQIA EARTHQUAKE ON AUG. 23, 1985 IN XINJIANG[J].Northwestern Seismological Journal,1987,9(1):42-47. |
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| Authors: | Lin Xuewen and Wang Lanmin |
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| Institution: | Lanzhou Seismological Institute, State Seismological Bureau and Lanzhou Seismological Institute, State Seismological Bureau |
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| Abstract: | At 4:45 on Sept. 12, 1985, 20 days later after Wuqia earthquake(Ms=7.4), a strong aftershock of Ms=6.7 occurred. A violent seismic accelerograph recorded its waves about 4 kilometers to the epicenter which was determined by the seismograph network. The maximum acceleration of its eastwest component is 123.8 gal, which is four times greater than its vertical component. The corresponding period of the acceleration peak value of the response spectrum of this earthquake is longer than those in Heicheng, Tangshan and Songpan. The intensity of the earthquake motion near the epicenter is equal to 7, but its real failure is only 6. |
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