Originally posted by JustMike
reply to post by emsed1

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Contrary to what you have stated, HAARP doesn't use ultra-low frequency (ULF) waves to heat up the ionosphere. HAARP stands for "High Frequency Active Auroral Research Program".

High frequency. So, as HAARP operates at high frequency, I'm not sure how it can be implicated in these ULF that have been observed by DEMETER.

Regards,

Mike

Can HAARP be used to generate ELF?

Yes. However, the HAARP facility does not directly transmit signals in the ELF frequency range. Instead, ELF signals are generated in the ionosphere at an altitude of around 100 km. Frequencies ranging from below one Hz to about 20 kHz can be generated through this ionospheric interaction process.

In addition to ground-based observations, the DEMETER satellite also provided space measurements of the heating effects during its passes over HAARP. The DEMETER results showed direct detection of HAARP ULF waves at 0.1 Hz. Moreover, density dips were observed every time HAARP was operated at CW mode, which provides clear evidence of duct formation by direct HF heating at F peak.