| STA/LTA—AIC算法对地震P波震相拾取稳定性影响 |
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| 引用本文： | 郭铁龙,张雪梅,邹立晔.STA/LTA—AIC算法对地震P波震相拾取稳定性影响[J].地震地磁观测与研究,2017,38(3):13-17. |
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| 作者姓名： | 郭铁龙 张雪梅 邹立晔 |
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| 作者单位： | 1.中国北京 100045 中国地震台网中心;2.中国北京 100036 中国地震局地震预测研究所 |
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| 基金项目： | 中国地震台网中心地震台网部日常运维（项目编号：1650301320105） |
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| 摘 要： | 选取区域地震台网记录的地震波形数据,使用STA/LTA算法与STA/LTA—AIC算法,进行地震P波震相初至到时自动拾取,对地方震及震中距较大的震相进行P波震相拾取效果分析,发现:STA/LTA算法对于地方震P波震相识别精度较高,与STA/LTA—AIC算法拾取的P波震相初至到时相差不大;震中距变大后,STA/LTA算法对P波拾取位置相对于最佳位置向后延迟,STA/LTA—AIC算法有效矫正了STA/LTA算法拾取位置的延迟问题,与人工拾取位置差别可忽略不计。
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| 关 键 词： | STA/LTA-AIC算法 P波拾取 震相自动识别 |
Influence of the STA/LTA-AIC algorithm on the stability of P-wave pickups |
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| Guo Tielong,Zhang Xuemei,Zou Liye.Influence of the STA/LTA-AIC algorithm on the stability of P-wave pickups[J].Seismological and Geomagnetic Observation and Research,2017,38(3):13-17. |
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| Authors: | Guo Tielong Zhang Xuemei Zou Liye |
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| Institution: | 1.China Earthquake Networks Center, Beijing Municipality 100045, China;2.Institute of Earthquake Forecasting, China Earthquake Administration, Beijing Municipality 100036, China |
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| Abstract: | The frst P arrivals of the selected earthquakes are picked automatically from the regional waveform data by using both STA/LTA and STA/LTA-AIC algorithms. In this paper, the effect of the P-phase picks of the local and distant events is analyzed. It is concluded that the arrival times of the frst P phases picked with the STA/LTA method are of high precision, and differ slightly from the ones with the STA/LTA-AIC; When the epicenters become more distant, the P arrivals picked with the STA/LTA are delayed from the best positions, which will be corrected effectively by the STA/LTA-AIC algorithm, thus the differences between the corrected positions and the manual results are negligible. |
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| Keywords: | STA/LTA-AIC algorithm P-wave pickup automatic seismic phase identifcation |
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