Risk of 8.0 Earthquake in California Rises, USGS Says Risk of 8.0 Earthquake in California Rises, USGS Says Risk of 8.0 Earthquake in California Rises, USGS Says Risk of 8.0 Earthquake in California Rises, USGS Says Risk of 8.0 Earthquake in California Rises, USGS Says Risk of 8.0 Earthquake in California Rises, USGS Says Risk of 8.0 Earthquake in California Rises, USGS Says Risk of 8.0 earthquake in California rises, USGS says