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| Titel |
Traveling ionospheric disturbances triggered by the 2009 North Korean underground nuclear explosion |
| VerfasserIn |
X. Zhang, L. Tang |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 33, no. 1 ; Nr. 33, no. 1 (2015-01-30), S.137-142 |
| Datensatznummer |
250121157
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| Publikation (Nr.) |
 copernicus.org/angeo-33-137-2015.pdf |
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| Zusammenfassung |
| Underground nuclear explosions (UNEs) can induce acoustic-gravity waves,
which disturb the ionosphere and initiate traveling ionospheric disturbances
(TIDs). In this paper, we employ a multi-step and multi-order numerical
difference method with dual-frequency GPS data to detect ionospheric
disturbances triggered by the North Korean UNE on 25 May 2009. Several
International GNSS Service (IGS) stations with different distances (400 to
1200 km) from the epicenter were chosen for the experiment. The results show
that there are two types of disturbances in the ionospheric disturbance
series: high-frequency TIDs with periods of approximately 1 to 2 min and
low-frequency waves with period spectrums of 2 to 5 min. The observed TIDs
are situated around the epicenter of the UNE, and show similar features,
indicating the origin of the observed disturbances is the UNE event.
According to the amplitudes, periods and average propagation velocities, the
high-frequency and low-frequency TIDs can be attributed to the acoustic waves
in the lower ionosphere and higher ionosphere, respectively. |
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