CNN CNN International April 25, 2015 09:33:00
Aftershocks of 4.5 or greater. let's go to derek van dam tracking the aftershocks answer the origin. >> yes, that's right, george, just from the usgs, two of the aftershocks have been of the magnitude of 5 or 5.3. it shows how significant the aftershocks are. keep in mind, the initial earth cake, 7.2 magnitude. that weakened infrastructure considerably. then you get the aftershocks coming that far. you can imagine what that does to an already weak infrastructure. things can collapse. bricks concrete, wood can come down easily. people need to stay away from buildings, glass and windows as much ...