| 京西北地区近震波速、平均波速比及地壳厚度的测定 |
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| 引用本文： | 张从珍,刘继禄,陈立强.京西北地区近震波速、平均波速比及地壳厚度的测定[J].华北地震科学,2000,18(2):70-75. |
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| 作者姓名： | 张从珍 刘继禄 陈立强 |
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| 作者单位： | 河北省地震局,石家庄,050021 |
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| 摘 要： | 本文选取原台ＤＤ－２型地震仪在１９９８－１９９９年间记录清晰、可靠的５０次张北地震和记录到Ｐｎ震相的２５次地震资料。通过计算，得到京西北地区直达波的平均传播速度为：Ｖｐｇ＝５．９９ｋｍ／ｓ，Ｖｓｇ＝３．４７ｋｍ／ｓ，平均波速比Ｖｐｇ／Ｖｓｇ＝１．７３，京西北地区的地壳厚度为４１Ｋｍ。
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| 关 键 词： | 地震波速比 地壳构造 震相 地壳厚度 |
| 修稿时间： | 1999-08-20 |
THE SURVEY FOR WAVE VELOCITY OF NEAR EARTHQUAKES AND MEAN VP/VS RATIO IN NORTHWEST BEIJING AND THE DEPTH OF CRUST |
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| Zhang Congzhen,Liu Jilu,Chen Liqiang.THE SURVEY FOR WAVE VELOCITY OF NEAR EARTHQUAKES AND MEAN VP/VS RATIO IN NORTHWEST BEIJING AND THE DEPTH OF CRUST[J].North China Earthquake Sciences,2000,18(2):70-75. |
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| Authors: | Zhang Congzhen Liu Jilu Chen Liqiang |
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| Abstract: | The data of 50 Zhangbei after shocks and the Pn seismic phase of 25 aftershocks recorded clearly and reliably by DD-2 Seimograph of Yangyuan seismostation during 1998 to 1999 period are analyzed.Through calculation we get the following results:the mean propagation velocity of direct wave in northwest Beijing area is Vps =5.99Km/s, Vsg =3.47Km/s,mean Vpg/Vsg =1.73,the crustal depth of the region is 41km. |
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| Keywords: | seismic Vp/Vs ratio crustal strucure seismic phase |
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