The earthquake hit on Sunday at 1:03 p.m. It was followed by a magnitude 2.5 earthquake a minute later, and magnitude 3 and ...

U.S. Geological Survey Magnitude measures the energy released at the source of the earthquake, the U.S. Geological Survey says. It replaces the old Richter scale. Quakes between 2.5 and 5.4 ...

For comparative purposes, the San Francisco earthquake was 8.4. The scale goes to 10 ... Our house had a cement floor and it takes a force of some magnitude to make it shake like that." ...