Large earthquakes aren’t supposed to happen in Tennessee. On Wednesday, the largest earthquake in 45 years hit eastern Tennessee, and it made headlines all over the nation. The magnitude 4.4 quake was so powerful that it was felt in portions of Alabama, Georgia, South Carolina, North Carolina and Kentucky. Significant shaking was even felt as far away as Atlanta, and that was highly unusual. The original earthquake was rapidly followed by a magnitude 3.0 aftershock, and subsequently there were several other noteworthy aftershocks. We live at a time when earthquakes are increasing in size and frequency, and many are concerned...