 About how long does the tragedy take place?
It has happened a hundred times in the long history of Earth—and, sooner or later, will happen again! It was still a matter of academic interest when in the late '40s geologists speculated on the relationship between the Kiowa Fault and the Conchas Fault farther south, in New Mexico, and which followed the Pecos as far south as Texas. Not even in the Rockies could anyone remember a series of rock slides as bad as this. They found themselves on the scene of what was fast becoming the most violent and widespread earthquake North America—probably the world—has ever seen in historic times. East, where sharp reports and muffled wheezes told of continued buckling and dropping, the earth trembled downward.
 About three months total.
 About three months total.  Over the course of a month.  It all took place between September and October.  It's all over in a matter of hours.