Geomagnetic conjugate observations of ionospheric disturbances in response to a North Korean underground nuclear explosion on 3 September 2017
Geomagnetic conjugate observations of ionospheric disturbances in response to a North Korean underground nuclear explosion on 3 September 2017
复制标题
2017 年 9 月 3 日朝鲜地下核爆炸引起的电离层扰动的地磁共轭观测
DOI：
10.5194/angeo-37-337-2019
复制
发表时间：
2019-05-20
影响因子：
1.9
通讯作者：
Zhao, Zhengyu
中科院分区：
文献类型：
--
作者：
Liu, Yi;Zhou, Chen;Zhao, Zhengyu
我们报告了对2017年9月3日朝鲜地下核爆炸(UNE)的电离层扰动的观测。利用国际全球导航卫星系统(IGS)站和SARM卫星提供的数据，观测到了地磁共轭电离层扰动。观测证据表明，未产生的电离层扰动以∼2 80 m S−1的速度从UNE中心径向传播。我们认为电离层扰动是由LAIC(岩石层-大气-电离层耦合)电场穿透引起的电动力学过程的结果。LAIC电场也可以沿磁力线映射到共轭半球，从而在共轭区域引起电离层扰动。未产生的强电场穿透对核试验场附近区域及相应的地磁共轭点的电离层扰动起着重要作用。
We report observations of ionospheric disturbances in response to a North Korean underground nuclear explosion (UNE) on 3 September 2017. By using data from IGS (International GNSS Service) stations and Swarm satellites, geomagnetic conjugate ionospheric disturbances were observed. The observational evidence showed that UNE-generated ionospheric disturbances propagated radially from the UNE epicenter with a velocity of ∼280 m s−1. We propose that the ionospheric disturbances are results of electrodynamic process caused by LAIC (lithosphere–atmosphere–ionosphere coupling) electric field penetration. The LAIC electric field can also be mapped to the conjugate hemispheres along the magnetic field line and consequently cause ionospheric disturbances in conjugate regions. The UNE-generated LAIC electric field penetration plays an important role in the ionospheric disturbances in the region of the nuclear test site nearby and the corresponding geomagnetic conjugate points.