Description: 1) Killer Quake!: Metropolitan Los Angeles is sitting on ground zero. Slicing under the high-rises of downtown is a network of potentially deadly faults that could trigger the most devastating natural disaster of our nation. NOVA takes viewers from urban trench sites to the top of the Santa Susanna Mountains, in search of clues to where nature will strike next. Includes printable materials for educators. 2) The Great San Francisco Earthquake: In the early 1900s, San Francisco stood as a proud and flourishing symbol of Americas recent conquest of the once-wild West. But on April 18, 1906, the city experienced an awesome reminder of the uncontrollable forces lying dormant just beneath the splendors of its cosmopolitan surface. Thirty times more powerful than the temblor that decimated northern California in 1989, this earthquake measured a ground-wrenching 8.3 on the Richter scale.