Identification of earthquake epicenter from measurements of electromagnetic pulses in the Earth
Identification of earthquake epicenter from measurements of electromagnetic pulses in the Earth
复制标题
通过测量地球电磁脉冲来识别地震震中
DOI：
10.1029/2005gl023691
复制
发表时间：
2005
影响因子：
5.2
通讯作者：
M. Tsutsui
中科院分区：
文献类型：
--
作者：
M. Tsutsui
我们已经开发了一个系统，用于找到在地球上检测到的电磁（EM）脉冲的到达方向。该系统检测到一个强烈的电磁脉冲时，地震（M5.5）发生。在对探测到的电磁脉冲进行分析时，首先推导了其频散特性。利用色散特性的数据，我们得到了与频率相关的电磁脉冲到达方向。其中，确定了指向电磁脉冲源的准确方向。最后，通过对电磁脉冲在波导模中传播距离的估计，确定了电磁脉冲的震源位置，表明电磁脉冲的震源位置在震中附近。
We have developed a system for finding arrival directions of electromagnetic (EM) pulses detected in the earth. The system detected an intense EM pulse just when an earthquake (M5.5) occurred. In the analysis of the detected EM pulse, we first derived its frequency dispersion characteristics. Using the data of the dispersion characteristics, we obtained frequency‐dependent arrival directions of the EM pulse. Among them, an exact direction pointing toward the EM pulse source was determined. Finally, we could find the source location of the EM pulse from the estimation of its propagation distance of a waveguide mode, which has shown that the EM pulse source location was on the earthquake epicenter.