Prologue

 

Humpty Dumpty sat on a wall,

Humpty Dumpty had a great fall.

All the king’s horses and all the king’s men

Couldn’t put Humpty together again!

 

* * * * *

 

California is one of America’s most earthquake-prone states.

The boundary between the massive Pacific and North American tectonic plates, the notorious San Andreas Fault, runs roughly southeast to northwest through much of California. In addition, a jumble of lesser transverse faults clutters the map of the state.

Sides of the San Andreas Fault move in the opposite direction, but at different speeds, causing geologic tension to build. That tension is released in the form of an earthquake. The possibility is always present for associated earthquakes among the nearby transform faults.

The U.S. Geological Survey says the state faces a forty-six percent chance of being hit by a Richter Scale magnitude 7.5 or higher earthquake in the next thirty years.

Possibly even today.