“‘In 1906, San Francisco was the largest city west of the Rockies. We had 400,000 people in the city,’ Eisner said. ‘Today we have 7 million in the Bay Area. And the consequences of a disaster of this magnitude in an urban area are significant.’” On the eve of tomorrow’s centennial of the great San Francisco earthquake, a new study suggests another Big One would mean a Katrina-level disaster for the Bay Area. “Seismologists generally agree that a repeat of a 1906-size earthquake is inevitable, though when and where along the fault are unknown. In 2002, the U.S. Geological Survey reported a 62 percent chance of a magnitude-6.7 earthquake or greater hitting the Bay Area within 30 years.” And, in a related story, historians look for lessons for post-Katrina New Orleans amid the rubble of 1906.