Jennifer Garner had her ears pierced for the first time ever especially for her part in this movie, but then allowed them to heal up again once filming was completed.
I thought we were having an earthquake.
Danny Thorell: Chill out, Mom. We don't live in L.A. anymore.
Early in the movie a geologist is on the phone with city officials describing the first quake, he can clearly be heard using the term "trembler" which apt as it may sound is not the correct term for seismic activity. He meant "temblor". Later another geologist describes the foreshock as an event that geologist's call an "amplitude". Amplitude is a measure of wave magnitude and is not used in that sense, in fact it would be a meaningless description without quantification of some sort.
Credits end with this statement: Natural disasters do happen and everyone is at risk. Find out what you can do to protect yourself and your family by visiting the web site for the Federal Emergency Management Agency. www.fema.gov
Originally broadcast on CBS in 1999, one shot is removed from the video version that was on television. On CBS, after Danny opens the door and finds that the rest of the school has been demolished. We see a close up shot of him and then he closes the door and weakly slumps to the floor. In the video version after he opens the door, we see his face close up and then it cuts to the next scene. The reason for this is because the movie aired in two parts on television and when he slumps down the screen reads "TO BE CONTINUED"