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Earth, Planets and Space
Fig. 5 | Earth, Planets and Space

Fig. 5

From: On the use of ELF/VLF emissions triggered by HAARP to simulate PLHR and to study associated MLR events

Fig. 5

Spectrogram of an electric component recorded onboard DEMETER in the Northern hemisphere between 20:14:20 and 20:16:20 UT (see Fig. 7), and in the frequency range 0–4 kHz. The power spectral density is color-coded according to the scale on the right. The parameters below the panels indicate the UT, the geographical latitude and longitude, the invariant latitude, and the McIlwain parameter L

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