| 台湾9.21集集地震考察兼论强震发震断层 |
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| 引用本文： | 彭阜南,叶银灿.台湾9.21集集地震考察兼论强震发震断层[J].地震地质,2004,26(4):576-585. |
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| 作者姓名： | 彭阜南 叶银灿 |
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| 作者单位： | 国家海洋局第二海洋研究所,杭州,310012;国家海洋局第二海洋研究所,杭州,310012 |
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| 摘 要： | 1999年9月21日,台湾中部山麓带发生了M7.3的大地震,震源深度为8km,财产损失及人员伤亡是百年来台湾许多地震中损失及伤亡最大的1次,其震级也是台湾本岛陆上所发生的地震级别最大的。震源机制属低角度逆冲断层成因,余震在平面上围绕着北港高基底作半圆状分布,在垂向上,则分布在逆冲断层的上盘。与此相应,地面变形及上部结构物的破坏,以车笼埔发震断层上盘最为激烈,下盘几乎不受影响。此外,地震断裂的北端,水平位移量高达9.8m,垂直抬升达10m,比主震区要大;其地面加速度峰值,亦高达水平为502gal,垂直为519gal。这些特点表明,地震是受到地下深处侏罗型叠瓦状构造的控制。此外,3个诱发地震中心均受当地的地质构造与地貌条件的控制。文中还叙述了震害及工程结构物破坏的特点,尤其是水工结构物的震害
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| 关 键 词： | 9.21集集地震 强震发震断层 车笼埔断层 叠瓦状构造 |
| 文章编号： | 0253-4967(2004)04-0576-10 |
| 收稿时间： | 04 July 2004 |
| 修稿时间： | 2004年7月5日 |
SEISMOGENIC FAULT OF THE 1999 CHI CHI EARTHQUAKE IN TAIWAN PROVINCE AND THE FEATURES OF EARTHQUAKE DAMAGES |
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| PENG Fu nan YE Yin can.SEISMOGENIC FAULT OF THE 1999 CHI CHI EARTHQUAKE IN TAIWAN PROVINCE AND THE FEATURES OF EARTHQUAKE DAMAGES[J].Seismology and Geology,2004,26(4):576-585. |
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| Authors: | PENG Fu nan YE Yin can |
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| Institution: | Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China |
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| Abstract: | A large earthquake of M 7.3 took place on September 21, 1999 at Chi Chi of Western Foothill, central Taiwan region. It caused severe damage and a great number of casualties that had gone beyond the destruction and casualty caused by any one of the historical earthquakes in the past 20 th century in Taiwan region. The magnitude of the earthquake is also the largest one of the shocks occurred in the inland of Taiwan Island. The main shock was located at 23.85°N, 120.82°E, with a depth of 8 km, and the focal m |
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| Keywords: | Chi Chi earthquake seismogenic fault Chelongpu faults Imbricated Structure |
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