Happen on a lesser known bay area fault that experts warn could cause significant damage. Reporter the usgs says the concord fault may not be a common name, but it could damage thousands of homes in a devastating quake. It is certainly not dor. And its capable of producing significant problems. Reporter its capable of doing a lot of damage in a densely populated area. Conquered is home to more than 120,000 people. Robert woods is the citys chief building official. He is most worried about soft story homes like this one. Even if buildings are up to code, he says that doesnt guarantee it sur survives survives a 6. 0 quake. Take a look at the options out there and protect their investment basically. Reporter we wondered if other recent earthquakes the last week or so had anything to do with yesterdays activity. Yeah. These events are completely separate from those and not influenced by the events in Southern California or further apart. Reporter the usgs says the last time there was a qua