The Event
There are no records from explorer’s journals or pioneers’ memories of
earthquakes occuring in this area, Scientists have not detected activity in
recent time. But, old fault scars indicate that earthquakes occurred before.
Geologists recognized that these faults are still active and predicted that the
earth’s crust could break here again. And it did!—in the identical location of the
last “prehistoric quake.”
On Friday, October 28, 1983, the crust ruptered! The shock—registering 7.3 on the
Richter Scale—spread 500 miles from the focal point, or “epicenter.” You are
looking at the scar, or scarp, created byt eh quake.
Thousands Springs Valley dropped about 7 1/2 feet while the Lost River Range
rose about a foot—both in a tilted manner.
