| Hi-net速度微分与KiK-net 加速度对比研究 |
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| 引用本文： | 冯静,高孟潭,胥广银,陈鲲.Hi-net速度微分与KiK-net 加速度对比研究[J].地震学报,2013,35(6):902-913. |
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| 作者姓名： | 冯静 高孟潭 胥广银 陈鲲 |
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| 作者单位： | 中国北京 100081 中国地震局地球物理研究所 |
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| 基金项目： | 国家科技支撑(2008BAK49B04-04);地震行业专项(201108002、201108014)共同资助 |
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| 摘 要： | 首先介绍了日本防灾科学技术研究所Hi-net和KiK-net台网布设情况和数据格式， 然后利用Hi-net和KiK-net共同记录到的282次Mj≥5.0、 震源深度≤100 km的地震， 分析了Hi-net速度微分与KiK-net加速度对数峰值比、 对数反应谱比的分布特征及其随震级、 距离的变化关系， 讨论了速度微分结果在幅值和频谱两方面的不确定性. 结果表明， 数字型速度记录微分与观测加速度无论是峰值还是频谱均存在一定差异， 不能将其直接用作加速度. 考虑到对数峰值比和对数反应谱比在不同震级档、 距离档存在一定规律， 因此对速度微分结果的峰值和特定周期的反应谱除以一定的系数， 可以降低数字型速度记录数值微分造成的不确定性. 另外， 也可采用概率的形式描述这种不确定性.
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| 关 键 词： | Hi-net KiK-net 速度记录 加速度记录 数值微分 峰值比 反应谱比 |
| 收稿时间： | 2012-05-31 |
A comparative study on Hi-net velocity differential and KiK-net acceleration |
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| Feng Jing;Gao Mengtan;Xu Guangyin;Chen Kun.A comparative study on Hi-net velocity differential and KiK-net acceleration[J].Acta Seismologica Sinica,2013,35(6):902-913. |
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| Authors: | Feng Jing;Gao Mengtan;Xu Guangyin;Chen Kun |
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| Affiliation: | Institute of Geophysics, China Earthquake Administration, Beijing 100081, China |
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| Abstract: | This paper introduces the configuration and data format of Hi-net and KiK-net constructed and operated by National Research Institute for Earth Science and Disaster Prevention of Japan. In order to analyze the uncertainty of velocity differential in both amplitude and spectrum, we study the distribution of natural logarithm of peak acceleration ratio and natural logarithm of acceleration response spectrum ratio between Hi-net velocity differential and KiK-net observed acceleration, as well as the ratios above in relation to magnitude and focal distance, using the data recorded by both Hi-net and KiK-net from 282 Mj≥5.0 earthquakes with focal depth less than 100 km. It turns out that the differential of digital velocity record is different from the observed acceleration in both amplitude and spectrum, so the former can not be directly treated as acceleration. Since the distribution of the two ratios mentioned above show some regular pattern, dividing peak acceleration or response spectrum at given period by some coefficient can reduce the uncertainty resulting from numerical differentiation of digital velocity record. Besides, the uncertainty can also be described in the way of probability. |
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