| Calibration of P/S amplitude ratios for seismic events in Xinjiang and its adjacent areas based on a Bayesian Kriging method |
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| 作者姓名： | 潘常周 靳平 肖卫国 |
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| 作者单位： | Northwest Institute of Nuclear Technology，Northwest Institute of Nuclear Technology，Northwest Institute of Nuclear Technology Xi'an 710613 China，Xi'an 710613 China Xi’an 710613 China |
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| 基金项目： | Foundation of Verification Researches for Army Control Technology (513310101). |
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| 摘 要： | Correction maps of P/S amplitude ratios for seismic events distributed in Xinjiang, China and its adjacent areas were established using a Bayesian Kriging method for the two seismic stations WMQ and MAK. The relationship between correction maps and variations of along-path features was analyzed and the validity of applying the cor- rection maps to improve performances of P/S discriminants for seismic discrimination was investigated. Results show that obtained correction maps can generally reflect event-station path effects upon corresponding P/S dis- criminants; and the correction of these effects could further reduce scatters of distance-corrected P/S measurements within earthquake and explosion populations as well as improve their discriminating performances if path effects are a significant factor of such scatters. For example, as corresponding Kriging correction map was applied, the misidentification rate of earthquakes by Pn(2~4 Hz)/Lg(2~4 Hz) at MAK was reduced from 16.3% to 5.2%.
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| 关 键 词： | 地震事件 振幅 分辨方法 地震学 |
| 文章编号： | 1000-9116（2007）06-0664-41 |
| 收稿时间： | 2007-03-19 |
| 修稿时间： | 2007-08-22 |
Calibration of P/S amplitude ratios for seismic events in Xinjiang and its adjacent areas based on a Bayesian Kriging method |
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| Pan Chang-zhou , Jin Ping and Xiao Wei-guo.Calibration of P/S amplitude ratios for seismic events in Xinjiang and its adjacent areas based on a Bayesian Kriging method[J].Acta Seismologica Sinica(English Edition),2007,20(6):664-674. |
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| Authors: | Pan Chang-zhou Jin Ping and Xiao Wei-guo |
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| Institution: | (1) Northwest Institute of Nuclear Technology, Xi’an, 710613, China |
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| Abstract: | Correction maps of P/S amplitude ratios for seismic events distributed in Xinjiang, China and its adjacent areas were established using a Bayesian Kriging method for the two seismic stations WMQ and MAK. The relationship between correction maps and variations of along-path features was analyzed and the validity of applying the cor- rection maps to improve performances of P/S discriminants for seismic discrimination was investigated. Results show that obtained correction maps can generally reflect event-station path effects upon corresponding P/S dis- criminants; and the correction of these effects could further reduce scatters of distance-corrected P/S measurements within earthquake and explosion populations as well as improve their discriminating performances if path effects are a significant factor of such scatters. For example, as corresponding Kriging correction map was applied, the misidentification rate of earthquakes by Pn(2~4 Hz)/Lg(2~4 Hz) at MAK was reduced from 16.3% to 5.2%. |
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| Keywords: | seismic events discrimination Kriging P/S amplitude ratios |
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