ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa


Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2021, Vol. 18, No. 6, pp. 275-282

Disturbances in the ionosphere caused by an underground nuclear test in North Korea on September 3, 2017

N.P. Perevalova 1 , N.V. Shestakov 2, 3 , M. Guojie 4 , W. Wu 4 
1 Institute of Solar-Terrestrial Physics SB RAS, Irkutsk, Russia
2 Far Eastern Federal University, Vladivostok, Russia
3 Institute of Applied Mathematics FEB RAS, Vladivostok, Russia
4 Institute of Earthquake Forecasting CEA, Beijing, China
Accepted: 17.11.2021
DOI: 10.21046/2070-7401-2021-18-6-275-282
Based on the analysis of data from several networks of ground-based receivers of global navigation satellite systems (GNSS) GPS, GLONASS, we studied the ionospheric disturbances caused by the underground nuclear test (explosion) realized on September 3, 2017 in North Korea. Disturbances in the ionosphere were observed on a large number of GNSS receiver — GNSS satellite beams. The shape of the disturbances caused by the underground nuclear test was markedly different from the shape of the disturbances observed after earthquakes. Ionospheric disturbances began to be registered ~8 min after the explosion and were observed for more than 5 hours. It is shown that in the first 1.5 h after the explosion, mainly travelling ionospheric disturbances (TIDs) were recorded. TIDs propagated from the epicenter with average velocities of 580, 250, and 130 m/s. TIDs had periods from 1.0 to 9.5 min and can be attributed to acoustic waves caused in the atmosphere by the underground nuclear test. After the TID passed, a long-lived (more than 3.5 h) region of sedentary ionospheric plasma disturbances was observed over the explosion site. The velocity of these disturbances was less than 100 m/s. The reason for the formation of this region requires further research and modeling.
Keywords: underground nuclear test, ionospheric disturbances, GNSS, GPS, GLONASS
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