TODAY   |  March 31, 2014

Quake and aftershocks rattle Southern California

Southern California experienced more than 150 aftershocks over the weekend following Friday’s magnitude-5.1 earthquake. Experts predict another quake will hit the area, but they are not sure when. NBC’s Rehema Ellis reports.

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This content comes from Closed Captioning that was broadcast along with this program.

>> now to those rattled nerves in southern california . that region experienced more than 150 aftershocks over the weekend following friday's 5.1 magnitude earthquake. and it has some asking the question again, what is next? in los angeles this morning, good morning.

>> good morning, savannah. take a look at the map behind me. all the red on the map represents fault lines in california. earthquakes happen essentially along the cracks. now some wondering if it could trigger more activity in the red areas and devastating earthquake.

>> reporter: this wasn't the big one -- but it has a big part of southern california really worried.

>> i'm scared it's going to happen again.

>> what's happened again and again is aftershocks. since friday's 5.1 magnitude quake centered in la habra outside of los angeles , there have been more than 150 aftershocks in the area, ranging from 1.0 to 4.1. video showing customers running for cover at this ice cream parlor and the furniture swaying in this 5-year-old's bedroom has rattled nerves. about a dozen homes have been roped off for further inspection.

>> yeah, you can see that.

>> mike and mickey have some serious repair work ahead on their house. the fire department warned them that cracks in their chimney could cause it to collapse in the next quake.

>> do you think about when that could happen?

>> every time we feel a tremor.

>> you don't know.

>> yeah. you don't know if that's the one.

>> the horror of past quakes and unknown fault lines fuels present fears. the deadly 1994 north ridge quake killed 57 people and caused more than $20 billion in damage. it struck along what was then an invisible fault while the infamous san andreas has been considered the most dangerous fault line in southern california , many experts say a major quake on the puente hills fault could have deadlier results, killing up to ten times as many californians. experts say there will be another earthquake and a huge one in this area. they just don't know when. savannah?

>> a lot of nerves out