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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Discussion papers | Copyright
https://doi.org/10.5194/angeo-2018-122
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Regular paper 08 Nov 2018

Regular paper | 08 Nov 2018

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This discussion paper is a preprint. It is a manuscript under review for the journal Annales Geophysicae (ANGEO).

Geomagnetic Conjugate Observations of Ionospheric Disturbances in response to North Korea Underground Nuclear Explosion on 3 September 2017

Yi Liu, Chen Zhou, Qiong Tang, Guanyi Chen, and Zhengyu Zhao Yi Liu et al.
  • Department of Space Physics, School of Electronic Information, Wuhan University, Wuhan, China

Abstract. We report observations of ionospheric disturbances in response to North Korea underground nuclear explosion (UNE) on 3 September 2017. By using data from IGS (International GNSS Service) stations and Swarm satellite, geomagnetic conjugate ionospheric disturbances were observed. The observational evidences showed that UNE-generated ionospheric disturbances propagated radially from the UNE epicenter with the velocity of ~280m/s. We propose that the ionospheric disturbances are results of electrodynamic process caused by LAIC (Lithosphere-Atmosphere-Ionosphere Coupling) electric field penetration. 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.

Yi Liu et al.
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Short summary
Ionospheric disturbances can be generated by human activities such as underground Nuclear Explosion (UNE) through LAIC mechanism. By using the GNSS and SWARM observations, we have investigated the geomagnetic conjugate ionospheric disturbance. We proposed that electric field generated by UNE can be an important mechanism for ionospheric disturbance. This electric field can map to the conjugate hemisphere along the magnetic field line and cause ionospheric disturbances in conjugate regions.
Ionospheric disturbances can be generated by human activities such as underground Nuclear...
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