Seismologists -- how loud would someone need to play their rock n' roll album so that a seismograph 5 miles away could detect which album it was given enough time?
Conversation
Replying to
If you directly couple the speaker movement to the ground vs the air gap, it needn't be loud on the surface.
A Richter 2/Mercati I, the seismographs could 'hear' it at 5 miles but people wouldn't even notice
1
Replying to
Concerts certainly show up on seismograms as detailed in nature.com/articles/s4159 but primarily as low-frequency sounds related to ground vibration
1