Today marks the day 19 years ago the massive Northridge earthquake struck in Southern California. The magnitude six-point-seven quake hit at 4:31 a.m. Fifty-seven people were killed, freeways collapsed, buildings were violently shaken and much of the area was plunged into an eerie predawn darkness as power transformers exploded. The 1994 quake caused an estimated 20-billion dollars in damage.