Diagram – see NEXT POST
USGS: “Harmonic tremor describes continuous rhythmic earthquakes that can be detected by seismographs. Harmonic tremors often precede or accompany volcanic eruptions.”
http://earthquake.usgs.gov/learn/glossary/?term=harmonic%20tremor
The Louisiana Sinkhole Bugle 
Today, at 22:15 UTC time, there was another BIG 6.5 off of Guatamala…then aroud 22:19 UTC *all* sinkhole helicorders showed activity similar the the tremor type display.
That makes 25 recorded quakes in this same area within the past few days…..crazy, right??
BTW, Pickwick Lake,AL had similar readings:
As did Vicksburg, MS:
yeah . . . that’s what I found on MO area quakes … at that one part near Guam, MO.
And the link about Kentucky with the map shows a big list of sizable quakes there too.
Something very bad is going on in a very bad place (new Madrid).