The states of Missouri, Arkansas, Mississippi, Alabama, Tennessee, Kentucky, Illinois, and Indiana felt the brunt of this quake, ruining lives and leaving residents in fear of aftershocks and possible larger quakes. The New Madrid Seismic Zone is still active and frequently produces small earthquakes. Scientists have estimated that a strong earthquake is inevitable and is overdue. Residents of the area are aware of the risk, but critics say they are not well prepared for a disaster. William Atkinson, author of "The Next New Madrid Earthquake", writes: