| 京津冀地区多种地球物理观测对天津爆炸事件的响应 |
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| 引用本文： | 章鑫,杜学彬,张元生,张丽峰.京津冀地区多种地球物理观测对天津爆炸事件的响应[J].地震学报,2016,38(2):37-52. |
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| 作者姓名： | 章鑫 杜学彬 张元生 张丽峰 |
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| 作者单位： | 1.中国兰州 730000 中国地震局兰州地震研究所 |
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| 基金项目： | 国家自然科学基金41374080 |
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| 摘 要： | 本文利用京津冀地区地球物理观测数据和卫星热红外遥感数据,研究了2015 年8 月12日天津港地面爆炸时的地球物理响应,获得了爆炸点周边的地球物理场扰动信息。结果表明:① 事件点附近地电阻率对地面爆炸的响应较为明显,事件发生后地电阻率观测曲线幅值急剧变小,且持续很长时间；② 事件发生的前后两天,地电场观测曲线出现了小幅升降异常,且与空间电子流量微小幅度下降的时间相同,而相应时段的地磁场则无相关扰动；③ 卫星热红外亮温在事件发生后明显增强,持续数天后恢复至事件前水平；④ 事件点周围的地下水位和形变测量未见明显响应。上述结果表明不同的地球物理观测对该事件的响应有差异,这对于分析和研判与地震等相关的异常具有参考意义,同时本文讨论的观测结果也有利于深入认知天津爆炸事件的过程。
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| 关 键 词： | 地面爆炸 地电场 卫星红外遥感 地下流体 地电阻率 形变 |
| 收稿时间： | 2015-10-14 |
Multiple geophysical observation response to the Tianjian explosion in Beijing-Tianjin-Hebei region |
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| Affiliation: | 1.Lanzhou Institute of Seismolog y,China Earthquake Administration,Lanzhou 730000,China;2.Lanzhou National Observatory o f Geophysics,Lanzhou 730000,China |
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| Abstract: | The surface explosion occurred in Tanggu distrct of Tianjin on Augusr 12,2015 caused wide attention .This paper presented the geophysical observation response ti this explosion based on the data form a number of geophysical observation stations in Beijing-Tianjin-Hebei region as well as the satellite infrared remote the point.the resulte showed that the response of georesis-tivity to the explosion near the event site is apparent.that is,the georesistivity curve declined rapidly after this event and lasted for a long time,It was also observed that the geoelectric field anomalies appeared with a small amplitude two days and after the event,and the space electronic flow declined slightly synchronously,however,no disturbance of geomagnetic field appeared at the same period.Meanwhile,the satellite in frared brghtness temperature significantly increased after the event,and lasted for several days.In addition,there was no obvious response of enderground water level and deformation to the event,The resultsindicate that different types of observations have different responses to this event,it will be valuable for analyzing and determing the anomalies related to earthquake in the future,What is more,it is also useful for a deeper cognition for the precess of Tianjin explosion. |
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