Re the Arkansas earthquake-

Was along the St.Francis flood control drainage ditches, which were constructed after the New Madrid quake in 1812 sunk huge swaths of ground in the area 8-12 ft. almost as if the ceiling of large underground areas had failed.

Earthquakes occur in this corridor from Marked Tree, AR all the way up to New Madrid, MO. strangely following the path of these drainage ditches built soon after the big quake.

Do the drainage canals serve as camouflage for a tunnel corridor?