There are some good quotes here.
"Unfortunately, the quake happened where they hadn't inferred there was a stuck point—it was further away from shore," said Dr. Simons. Plus, the 9.0-magnitude temblor turned out to be 33 times as powerful as the expected 8.0-magnitude temblor.
"It's taught us a lesson that our short human experience and earthquake records can only provide a small window" into geological time, said Dr. Elliott.
Well, maybe this gets us away from our 'See Fault' approach -- I see a fault, therefore, an earthquake will happen on it. Maybe it won't!