DEMETER在2010年海地强烈地震前后两个月观测到的增强的ULF辐射
Enhanced ULF radiation observed by DEMETER two months around the strong 2010 Haiti earthquake
摘要：
在本文中，我们研究的能量超低频电磁波已记录的卫星DEMETER，在其通过海地之前和之后的破坏性地震。这次地震发生在2010年1月12日，地点为北纬18.46度，东经287.47度，震级为7.0级。具体地说，我们关注的是Ez-电场分量能量的变化，涉及的时间段为100天前和50天后的强震。为了研究这些变化，我们开发了一种新的方法，可以分为两个阶段：首先，我们过滤信号，只保留非常低的频率，然后，我们使用奇异谱分析技术，结合三次多项式滤波器消除其趋势。如图所示，在强震前30天的时间间隔内观察到能量的显著增加。这一结果清楚地表明，超低频电磁波能量的变化可能与强震现象有关。此外，还观察到能量的变化，25天后的强震与强余震活动。最后，我们提出的结果有关的能量变化的比较在夜间和白天通过的卫星在海地，这表明在平均能量值的差异，但类似的结果就能量变化率而言。
英文摘要：
In this paper we study the energy of ULF electromagnetic waves that have been recorded by the satellite DEMETER, during its passing over Haiti before and after a destructive earthquake. This earthquake occurred on 12/1/2010, at geographic Latitude 18.46o and Longitude 287.47o, with Magnitude 7.0 R. Specifically, we are focusing on the variations of energy of Ez-electric field component concerning a time period of 100 days before and 50 days after the strong earthquake. In order to study these variations, we developed a novel method that can be divided in two stages: first we filter the signal keeping only the very low frequencies and afterwards we eliminate its trend using techniques of Singular Spectrum Analysis, combined with a third-degree polynomial filter. As it is shown, a significant increase in energy is observed for the time interval of 30 days before the strong earthquake. This result clearly indicates that the change in the energy of ULF electromagnetic waves could be related to strong precursory earthquake phenomena. Moreover, changes in energy were also observed 25 days after the strong earthquake associated with strong aftershock activity. Finally, we present results concerning the comparison in changes in Energy during night and day passes of the satellite over Haiti, which showed differences in the mean energy values, but similar results as far as the rate of energy change is concerned.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
