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Figure 4 | Earth, Planets and Space

Figure 4

From: ELF magnetic fluctuations detected by Kaguya in deepest lunar wake associated with type-II protons

Figure 4

Spectra of magnetic fluctuations. During (a) the magnetically fluctuating period from 10:11:00 to 10:11:32 on 24 September 2008 and (b) a quiet period from 10:00:00 to 10:00:32 on 24 September 2008. Red, green, and blue curves are for B x−sat, B y−sat, and B z−sat components in spacecraft coordinates, respectively. Vertical lines indicate proton cyclotron frequencies. Noise reduction as employed in Figure 3 and the Hamming window were applied prior to the Fourier transform.

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