He claimed that the booms were the result of Super Fracking that had exposed a large underground cavern that sat against an exposed section of a subsection of the Madrid fault. That when this happened they knew they'd messed up big time. From then on the US Gov has been undergoing a 24/7 operation of keeping the cavern pressurized with fluid, to prevent the methane from travelling through the fault and destabalizing it.
He claimed that, if methane bubbles started appearing in the gulf, it would be a sign that the US efforts had failed and that the methane was now free flowing.
He said if we started to see methane bubbles and sinkholes around the gulf coast, it would signal a window of weeks before a cascade failure occurs.
When the methane forces it's way through the fault, the resulting force will rip up the entire fault complex and end up ripping the entire Mississppi River valley a new one.
He estimated at least 100 miles on either side of the Mississppi as being underwater. The new continental divide.
A retired Texaco geologist has theorized that the Gulf coast area
is a mini-plate that affects the New Madrid rift area.
Here is more info
[link to www.aapg.org