Geomagnetic conjugate observations of ionospheric disturbances in response to a North Korean underground nuclear explosion on 3 September 2017

Abstract. 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.

[1]  Zemin Wang,et al.  Tridimensional reconstruction of the Co-Seismic Ionospheric Disturbance around the time of 2015 Nepal earthquake , 2018, Journal of Geodesy.

[2]  Yi Liu,et al.  An electric field penetration model for seismo-ionospheric research , 2017 .

[3]  Mei Li,et al.  Statistical analysis of the ionospheric ion density recorded by DEMETER in the epicenter areas of earthquakes as well as in their magnetically conjugate point areas , 2017 .

[4]  E. D. de Paula,et al.  Investigations of conjugate MSTIDS over the Brazilian sector during daytime , 2017 .

[5]  Jann‐Yenq Liu,et al.  Infrasound in the ionosphere from earthquakes and typhoons , 2017, Journal of Atmospheric and Solar-Terrestrial Physics.

[6]  M. Cabrera,et al.  Nonlinear acoustic waves in the viscous thermosphere and ionosphere above earthquake , 2016 .

[7]  T. Maruyama,et al.  Ionosonde tracking of infrasound wavefronts in the thermosphere launched by seismic waves after the 2010 M8.8 Chile earthquake , 2016 .

[8]  S. Wen,et al.  The vertical propagation of disturbances triggered by seismic waves of the 11 March 2011 M9.0 Tohoku earthquake over Taiwan , 2016 .

[9]  Biqiang Zhao,et al.  Ionospheric and geomagnetic disturbances caused by the 2008 Wenchuan earthquake: A revisit , 2015 .

[10]  J. Qian,et al.  The characteristics of quasistatic electric field perturbations observed by DEMETER satellite before large earthquakes , 2014 .

[11]  Hermann Lühr,et al.  Determining field-aligned currents with the Swarm constellation mission , 2013, Earth, Planets and Space.

[12]  D. Grejner-Brzezinska,et al.  Ionospheric observations of underground nuclear explosions (UNE) using GPS and the Very Large Array , 2013, 1308.0722.

[13]  Y. Hao,et al.  Teleseismic magnetic effects (TMDs) of 2011 Tohoku earthquake , 2013 .

[14]  J. Garrison,et al.  Ionospheric disturbances observed coincident with the 2006 and 2009 North Korean underground nuclear tests , 2012 .

[15]  Dorota A. Grejner-Brzezinska,et al.  Ionospheric detection of the 25 May 2009 North Korean underground nuclear test , 2011 .

[16]  Irina Zakharenkova,et al.  Simulation of seismo-ionospheric effects initiated by internal gravity waves , 2011 .

[17]  Qinghua Huang,et al.  Retrospective investigation of geophysical data possibly associated with the Ms8.0 Wenchuan earthquake in Sichuan, China , 2011 .

[18]  H. Le,et al.  Observations and simulations of seismoionospheric GPS total electron content anomalies before the 12 January 2010 M7 Haiti earthquake , 2011 .

[19]  Tong Xu,et al.  Anomalous enhancement of electric field derived from ionosonde data before the great Wenchuan earthquake , 2011 .

[20]  Il-Young Che,et al.  Infrasound observation of the apparent North Korean nuclear test of 25 May 2009 , 2009 .

[21]  Xuhui Shen,et al.  Analysis of ionospheric plasma perturbations before Wenchuan earthquake , 2009 .

[22]  M. Matovà,et al.  Ionospheric Quasi-static Electric Field Anomalies During Seismic Activity , 2009 .

[23]  Dimitar Danov,et al.  Quasi-static electric fields phenomena in the ionosphere associated with pre- and post earthquake effects , 2008 .

[24]  K. Shiokawa,et al.  Geomagnetic conjugate observations of medium‐scale traveling ionospheric disturbances at midlatitude using all‐sky airglow imagers , 2004 .

[25]  Tadahiko Ogawa,et al.  Geomagnetic conjugate observations of equatorial airglow depletions , 2002 .

[26]  V. Sorokin,et al.  Electrodynamic model of the lower atmosphere and the ionosphere coupling , 2001 .

[27]  M. Parrot,et al.  Strong atmospheric disturbances as a possible origin of inner zone particle diffusion , 1999 .

[28]  M. Parrot,et al.  Response of the ionosphere to natural and man-made acoustic sources , 1995 .

[29]  L. Stenflo,et al.  Induced electromagnetic turbulence in the ionosphere and the magnetosphere , 1994 .

[30]  Y. Mikhailov,et al.  VLF effects in the outer ionosphere from the underground nuclear explosion on Novaya Zemlya Island on 24 October, 1990 (intercosmos 24 satellite data) , 2000 .

[31]  Sergey Pulinets,et al.  Quasielectrostatic Model of Atmosphere-Thermosphere-Ionosphere Coupling , 2000 .

[32]  Y. Ruzhin,et al.  Earthquake precursors in magnetically conjugated ionosphere regions , 1998 .