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1.
Using Array Methods to Identify and Process Weak Signals Generated by the Brightlight(Ⅰ) 50t Explosion 
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下载免费PDF全文 Waveforms generated by the 50t explosion of project Brightlight(Ⅰ) were recorded by HILR array.Using array techniques,the author performed identification,f-k analysis,velocity spectrum analysis,etc.of the weak signals.The analysis results show that the signal-to-noise ratio after beamforming was obviously enhanced,and the signal could be clearly shown.The energy from this explosion was mainly concentrated in the 1 ～ 8Hz range from f-k analysis.The velocity spectrum gave clear positions of event phases,which could not be seen in the original weak signals.The maximum energy distribution obtained by the Beaman method is close to the theoretical value in the azimuth-slowness domain. 相似文献
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中国数字地震台网(CDSN)和IMS/PS台阵的监测定位能力评估 总被引：12，自引：6，他引：6
根据近震震级(ML)和远震震级(Ms)公式,估算了中国数字地震台网(CDSN)对近震和远震的定位能力,并把IMS／PS台阵(海拉尔台阵与兰州台阵)作为加强台站,与CDSN一并估算了其联合定位能力,此后,对两个定位能力结果做了比较。 相似文献
3.
Using Array Methods to Identify and Process Weak Signals Generated by the Brightlight(Ⅰ) 50t Explosion 下载免费PDF全文
下载免费PDF全文 Waveforms generated by the 50t explosion of project Brightlight(Ⅰ) were recorded by HILR array.Using array techniques,the author performed identification,f-k analysis,velocity spectrum analysis,etc.of the weak signals.The analysis results show that the signal-to-noise ratio after beamforming was obviously enhanced,and the signal could be clearly shown.The energy from this explosion was mainly concentrated in the 1 ～ 8Hz range from f-k analysis.The velocity spectrum gave clear positions of event phases,which could not be seen in the original weak signals.The maximum energy distribution obtained by the Beaman method is close to the theoretical value in the azimuth-slowness domain. 相似文献
4.
郝春月 《地震地磁观测与研究》1999,20(4):68-70
中国地震要求各台网每月上网传输地震目录，并提供了文件格式。各台网每月用ＣＳＣＥ编目系统编辑地震目录，但其格式不是地震局所要求，所以要求进行文件的格式转换。本文针对此问题进行了探讨。 相似文献
5.
We use the slowness-azimuth station correction （SASC） method to improve the location accuracy of the Wenchuan aftershocks recorded by the Nagqu and Hotan seismic arrays. The results show that the standard deviations of back-azimuth and slowness errors of Wenchuan aftershocks recorded by the Nagqu array decreased by 32% and 58% respectively after correction. The decrease is 38 % and 71% for the Hotan array. After the correction, the location accuracy of all Wenchuan aftershocks recorded by the Nagqu array is improved. For the Hotan array, the accuracy is improved in the slowness estimation for 78 % of aftershocks and in back-azimuth estimation for all aftershocks. 相似文献
6.
地震台阵、台阵地震学在中国的现状与发展 总被引：4，自引：0，他引：4
本文介绍了地震台阵建设的国内外进展与趋势,以及台阵技术研究的国内外进展情况,并展开论述了下一阶段有关地震台阵技术研究的内容。 相似文献
7.
西藏地震台网检测能力与定位能力评估 总被引：4，自引：3，他引：1
根据西藏自治区地震台网的记录，对现有台站的检测能力和定位能力进行了评估，再把“十五”计划增加的台站加入西藏地震台网，估算了该区新台网的检测能力和定位能力。 相似文献
8.
The data recorded during the site survey in the Zhangzhou area in Fujian Province between October 23, 2007 and December 3, 2007 was analyzed. The main methods adopted for the noise level of this area are the noise root mean square (RMS), noise power spectrum density and noise coherency function. The results indicate that the noise levels of the survey sites are higher in the 1s-10s periods, which is the main frequency band of preliminary microseism, and also, two main noise sources were found in 1.5Hz and around 5Hz. According to arithmetic, the direction and frequency band of the noise source were analyzed and academic proofs were presented. At last, we found that the noise source in 1.5Hz was made by the water wave aroused by the wind in the reservoir region and the noise source around 5Hz was made by the power station in the northeast direction. 相似文献
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10.
Hao Chunyue 《中国地震研究》2006,20(3):262-270
INTRODUCTIONFrom Aug.4 to Aug.26 ,2004 ,the Institute of Geophysics , China Earthquake Administrationcarried out a field survey in the Naqu district in Tibet ,in cooperation with the Beijing EarthquakeAdministration.10 stations were deployed with concentric circle methods for the field observation.Asthe result ,a large quantity of original waveformdata was recorded. Since the establishment of theNaqu seismic array will correspond withthe arraytype of the International Monitoring Sys… 相似文献