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Io-B N events April 23, 2025 from the Dark Sky Observatory


 

Thanks to Thomas Ashcraft for the head's up about this event.? I have posted 4 spectrograms.? The first shows the full extent of the "storm" from about 21:40 to 22:10.? Look first at frequencies between 22 and 24MHz, then look for a long string of bursts starting at about 25MHz and ending at about 23MHz.? the next three spectrograms show these bursts in more detail.
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Richard Gray