Not worth worrying about. Also not worth worrying about a "super-eruption" in Yellowstone. Thanks BusterDog.
I respectfully disagree on this one. Yellowstone is not something someone in Memphis should worry too much about. But, New Madrid is something people should be aware of, and they should have a plan.
The largest recorded earthquake in the US was there. It WILL happen again, as it has fairly regularly for centuries.