For discussion about the scaling, go here

Context: and

Basically pick any random bit after this point in the video and you'll see mentions of the cavern shaking. With that out of the way, we can utilize the method used here to measure its AP

Cavern Size and distance
  • Scale and Distance

Cliff fragmented

  • Magnitude at epicenter: 9+0.0238*3km = 9.0714
  • Energy: 10^[1.5*( 9.0714 )+4.8] = 2.5532891515338885e18 joules
  • Result: 610.250~ Megatons of TNT, Mountain level+
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