Effectiveness Analysis of Earthquake Early Warning System in Zhenjiang
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摘要: 2015年镇江市建成地震预警系统，但自该系统建成后，镇江地区未发生过中强震，使用方对该系统的实际应用效果不明确。地震部门对预警终端的增补也缺少相应的依据。通过计算台点间距及预警盲区的相互关系，认为目前该系统的布点是合理的。根据地震动峰值加速度和地震烈度衰减关系，镇江地区不同地点布设的地震预警终端最多可在地震动到来前2.5—13.1s发出有效预警信号。地震预警系统对本地区Ms5.0级以上的地震有效，对Ms6.0级以上地震效果更好。Abstract: In 2015, The earthquake early warning system was completed in Zhenjiang. But since the system was built, no moderate-strong earthquake have occurred in Zhenjiang area, so the users are not clear about the actual application effect of the system and there is no corresponding basis for the addition of early warning terminal for earthquake departments. By calculating the interrelation between station density and warning blind area, it is concluded that the system is reasonable at present. Based on the attenuation laws of PGA and Seismic Intensity, it is caculated that the earthquake early warning terminals in different areas can send out effective warning signals up to 2.5-13.1 seconds before the ground motion. The earthquake early warning system is effective for earthquakes above Ms5.0 in Zhenjiang, and better for earthquakes above Ms6.0.
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Key words:
- Earthquake early warning /
- Effective warning time /
- Seismic intensity
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图 2 台点间距与预警盲区关系曲线
Figure 2. Relation curves between station density and warning blind area
图 3 地震动峰值加速度和地震烈度衰减关系曲线
Figure 3. Curves of seismic peak acceleration and seismic intensity attenuation laws with various magnitudes
表 1 各地震预警终端有效预警时间
Table 1. Effective earthquake early warning time of the earthquake early warning terminals
预警终端 Δsta3/km Δepi/km Tmea-Ms5.0/s Tmea-Ms5.5/s Tmea-Ms6.0/s 镇江市地震台 17.3 49.2 2.5 4.5 4.5 镇江实验学校万科魅力之城分校 17.3 53.5 2.5 5.7 5.7 江滨实验小学 17.3 57.8 2.5 7.7 6.9 辛丰小学 17.3 55.8 2.5 6.3 6.3 丹阳华南实验学校 17.3 46.8 2.5 3.9 3.9 扬中市外国语小学 17.3 80.8 2.5 7.7 13.1 句容实验小学 16.0 61.8 2.5 7.7 8.1 镇江新区实验小学 17.3 68.7 2.5 7.7 9.8 
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国家地震局震害防御司, 1995.中国历史强震目录(公元前23世纪-公元1911年).北京:地震出版社. 郭凯, 温瑞智, 杨大克等, 2016.地震预警系统的效能评估和社会效益分析.地震学报, 38(1): 146-154. https://www.cnki.com.cn/Article/CJFDTOTAL-DZXB201601015.htm 孔祥元, 郭际明, 刘宗泉, 2001.大地测量学基础.武汉:武汉大学出版社. 卢建旗, 李山有, 李伟, 2009.中强地震活动区地震动衰减关系的确定.世界地震工程, 25(4): 33-43. https://www.cnki.com.cn/Article/CJFDTOTAL-SJDC200904006.htm 王国新, 孙奉劼, 王东明, 2014.高速铁路地震预警时间与预警区域和震级的关系.中国铁道科学, 35(2): 120-124. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGTK201402020.htm 中国地震局震害防御司, 1999.中国近代地震目录(公元1912年-1990年, MS≥4.7).北京:中国科学技术出版社. 中华人民共和国国家质量监督检验检疫总局, 中国国家标准化管理委员会, 2009. GB/T 17742-2008中国地震烈度表.北京:中国标准出版社. -
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