The Anon was talking about the "signature" on the seismograph.
Earthquakes have different signatures than that–the signature the anon posted was indicative of a bomb or some kind of man-made explosion.
And a four is shit if the epicenter is below your feet.
I keep up with Dutch. Trust me.
A quarry blast generates 1.+ activity seismically.
Kim Jong Un's blast generated 6.+.
What kind of bomb is required to produce 4.+ activity?
That was a bomb signature on the seismic graph the anon posted.
Do the Math.
The abrupt beginning and end signified bomb.
Earthquakes tend to rumble more for a bit longer. Earth is a living thing.