3.4-magnitude quake hits near Napa, California By Faith Karimi and Joe Sutton, CNNUpdated 3:21 PM ET, Tue September 9, 2014Just WatchedWhy aren't earthquake warnings better?replayMore Videos ...Why aren't earthquake warnings better? 01:38Story highlightsThere are reports of damage so far, the Napa County Sheriff's Office says The quake hit 5 miles southwest of Napa It comes a week after a 6.0-magnitude quake struck the same areaA 3.4-magnitude earthquake rumbled through northern California early Sunday, the U.S. Geological Survey said.The quake hit 5 miles southwest of Napa, the center of California's famed wine country. There are no reports of damage so far, the Napa County Sheriff's Office said. It comes a week after a 6.0-magnitude quake -- the strongest in northern California's Bay Area in a quarter of a century -- struck the same area on August 24. Last week's quake injured dozens, damaged historic buildings in downtown Napa and turned fireplaces into rubble. It also caused at least $1 billion in property damage in Napa and other communities. The two earthquakes were a little over a mile from each other. EarthquakesMegaquake could hit West CoastOregon sits on a huge fault line, the Cascadia Subduction Zone, that separates two of the Earth's tectonic plates and could one day cause a huge quake.Earthquakes Fast FactsHere's some background information about earthquakes worldwide. Measuring the magnitude of earthquakesWe know that an 8.7-magnitude earthquake is a big one, but how are they measured?Why aren't earthquake warnings better?Chad Myers explains how earthquake warning systems work, and why we can't predict seismic events earlier. 5 most powerful recorded earthquakesWhat you need to know about the most powerful earthquakes recorded. Can earthquakes be predicted? Predicting earthquakes is impossible, but that hasn't stopped scientists from trying.The place where two earthquakes hit every hourThe light bulb above our dining room table begins to swing. The windows rattle. The table shakes. Six things we've learned since 1994 Northridge EarthquakeTwenty years ago, southern California experienced a "big one." Are earthquakes on the rise?Northern California's biggest earthquake in 25 years has people asking: Is the world seeing more tremors than usual? Nye: 'Unlikely' big quake still seriousScientist Bill Nye reacts to the impact of the Northern California earthquake and the threat of the looming "Big One."Why Californians shun quake insurance90% of the earthquakes that strike the United States are located in California but only about 10% of homeowners there have earthquake insurance. What gives?Dramatic earthquake rescue caught on camAn 88-year-old woman was rescued from earthquake rubble after being trapped for 50 hours.Earthquake-proof table uses geometry to save livesThe earthquake-proof table is an invention that aims to provide affordable protection to people in earthquake-prone areas of the world.Earthquake so powerful it creates islandA 7.7-magnitude earthquake in southern Pakistan was so powerful it created a new island. Why large quakes keep occurring in ChinaCNN's Mari Ramos explains why China and its surrounding region is prone to major earthquakes. Chile's history with earthquakesCNN's Rafael Romo looks at the most recent earthquake to strike Chile and its history with previous quakes.More from usWhere does the snow go after back-to-back blizzards?