| 两种地震预警定位方法的比较 |
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| 引用本文： | 李军.两种地震预警定位方法的比较[J].中国地震研究,2014(4):502-509. |
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| 作者姓名： | 李军 |
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| 作者单位： | 福建省地震局，福州市华鸿路7号 350003 |
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| 基金项目： | This research was funded by the National Key Technology R＆D Program of China (2009BAK55B02) ． |
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| 摘 要： | In this paper, according to the Fujian Seismic Network earthquake catalog records, the Tnow method and the Four Stations Continuous Location method （hereinafter called FSCL） put forward by Jin Xing are inspected by using P-wave arrival information of the first four stations of each seismic event. Results show that for earthquakes within the network, both methods can obtain similar location results and location deviations are small for the majority of the events. For earthquakes outside the network, the location deviation may be amplified as the epicentral distance increases, owing to the seismic station distribution which spread toward the side of the epicenter and the small opening angle between seismic stations used for locating and epicenter. For the FSCL method, the impacts of the wave velocity on the location results may be significant for earthquakes outside the network. Thus, selecting a velocity model which is similar to the actual structure of the wave velocity will contribute to improving location results of earthquakes. The FSCL method can locate more seismic events than the Tnow method. It concludes that the Tnow method makes use of mistake information from some non-triggering stations in earthquake catalog, and some P-wave arrivals are not included in the earthquake catalog due to discontinuous records or unclear records of the seismic phase, which induces incorrect location.
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| 关 键 词： | 地震定位方法 地震预警 位置偏差 地震目录 地震事件 错误信息 地震台网 震中距离 |
| 收稿时间： | 2013/5/28 0:00:00 |
Comparison of Two Earthquake Location Methods for Seismic Early Warning |
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| Li Jun.Comparison of Two Earthquake Location Methods for Seismic Early Warning[J].Earthquake Research in China,2014(4):502-509. |
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| Authors: | Li Jun |
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| Institution: | [1]Earthquake Administration of Fujian Province, Fuzhou 350003, China; [2]Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China; [3]Fuzhou University, Fuzhou 350002, China |
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| Abstract: | Earthquake early warning Tnow location method Earthquake catalog Fourstation continuous location method （FSCL） |
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| Keywords: | Earthquake early warning Tnow location method Earthquake catalog Four station continuous location method (FSCL) |
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