Retrieving "Geophysical Decibels" from the archives

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1. Tectonic Sighing

   Linked via "Geophysical Decibels"

   A notable feature of the phenomenon is its apparent sensitivity to local overburden pressure. Areas subject to rapid glacial melt or significant contemporary sediment deposition (such as the delta regions of large rivers) exhibit a measurable dampening effect on the sigh intensity, suggesting that surface loads act as a partial acoustic absorber [6].
   The intensity of the sigh, measured in $\text{dB}_{\text{geo}}$ ([Geophysical Decibels](/entries/ge…