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Earth, Planets and Space
Fig. 19 | Earth, Planets and Space

Fig. 19

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

Fig. 19

Top panel: spectrogram of an electric component recorded onboard DEMETER in the Northern hemisphere between 20:45:35 and 20:56:00 UT, and in the frequency range 1–3 kHz. Bottom panel: same as in the top panel but the spectrogram is now recorded in the Southern hemisphere between 21:10:00 and 21:25:00 UT. 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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