They weren't that tiny either. All were stronger than 2.2 in magnitude which is not even considered a moderate earthquake, but still unusual in a swarm in this part of the Missouri/Arkansas border region. USGS If you zoom into the USGS shake map, you'll see they were all centered along...
The good news is it does not appear to be the result of anyone's frozen water pipes or at least let's hope. If you hear a weird boom over the next couple of days, know that the answer might very well be right under your feet. Oh, andNew Madrid Fault, don't even think about d...