| 利用JCZ-1T地震计BB通道观测数据检测地球自由振荡 |
| |
| 引用本文： | 张嘉敏,张小飞.利用JCZ-1T地震计BB通道观测数据检测地球自由振荡[J].大地测量与地球动力学,2017,37(12):1297-1301. |
| |
| 作者姓名： | 张嘉敏 张小飞 |
| |
| 摘 要： | 采用库尔勒台JCZ-1T地震计BB通道垂直向的观测数据，利用功率谱密度估计方法，在没有对观测资料进行任何改正的情况下，获取2016-03-02印尼苏门答腊岛海域7.8级和2016-04-17厄瓜多尔7.5级大地震激发的0S7～0S60基频球型自由振荡，并与PREM模型理论值进行对比分析。结果表明，实测值与理论值相吻合，除部分振型与理论值偏差较大以外，其余振型与理论值偏差均小于0.1％。印尼苏门答腊岛海域7.8级地震所检测的球型振荡能量频谱分布及振型与厄瓜多尔7.5级地震所检测的球型振荡有一定差别，前者所能检测的振型数量相对较多。
|
| 关 键 词： | JCZ-1T地震计 地球自由振荡 功率谱密度 PREM模型 |
Using Observed Data of BB Channel of the JCZ-1T Seismometer to Detect Earth’s Free Oscillations |
| |
| ZHANG Jiamin,ZHANG Xiaofei.Using Observed Data of BB Channel of the JCZ-1T Seismometer to Detect Earth’s Free Oscillations[J].Journal of Geodesy and Geodynamics,2017,37(12):1297-1301. |
| |
| Authors: | ZHANG Jiamin ZHANG Xiaofei |
| |
| Abstract: | This paper uses data recorded by the BB channel of JCZ-1T ultra broadband seismometer at Korla seismic station. We use power spectral density estimation methods, acquiring the fundamental frequency spherical free oscillation 0S7～0S60 of the Indonesian, sea of Sumatra M7.8 earthquake of March 2, 2016 and the Ecuadorian M7.5 earthquake of April 17, 2016, without any correction pretreatment. We conclude that the measured values coincide with theoretical values. Except some modal, the error ratio is less than 0.1% in the rest, by comparing with PREM theoretical values. The conclusions suggest the significance of further research on the internal structure of earth and focal mechanism. |
| |
| Keywords: | JCZ-1T seismometer free oscillations of the earth power spectral density PREM model |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《大地测量与地球动力学》浏览原始摘要信息 |
| 点击此处可从《大地测量与地球动力学》下载免费的PDF全文 |
