Stellar Space Weather Could Dim and Smear Ultra-Narrow Signals, Reframing SETI Searches

To the point

SETI Institute researchers say turbulent plasma around distant stars can broaden and dim ultra-narrow radio signals, spreading them across more frequencies and lowering their peak power so they fall below typical detection thresholds, especially around M-dwarf stars, which means searches should stay sensitive to broader signals and focus on what actually arrives on Earth rather than what might have been transmitted.