Few natural phenomena attract as much public attention as earthquakes. Seldom does a month go by that we do not hear of a destructive earthquake somewhere in the world. Events like the earthquake–tsunami sequences during March, 2011 in Japan and December, 2004 in Sumatra are grim reminders that earthquakes and their consequences can cause almost unimaginable destruction and loss of life. Although much less severe, events such as the August, 2011 earthquake in Virginia and the April, 2008 earthquake in Illinois are sobering reminders that destructive earthquakes can occur, even in what is generally thought to be stable continental areas. Consequently, a strong public interest exists in Minnesota regarding earthquakes, as does some concern about the potential of destructive earthquakes ever occurring here.