The magnitude 6.7 Northridge Earthquake occurred on January 17, 1994 at 4:31 AM, killing more than 60, injuring more than 9,000, and causing widespread damage …

Foreshocks are earthquakes that precede larger earthquakes in the same location.

Foreshocks can occur weeks or months in advance of a main temblor; whereas aftershocks succeed major earthquakes. This aftershock of the M6.7 Northridge earthquake of January 17, 1994 was the 10th aftershock of magnitude 5.0 or greater for this sequence. There were no immediate foreshocks. The Northridge Earthquake of 1994 ocks or aftershocks. The magnitude 6.7 Northridge earthquake started on Jan. 17, 1994 at 5 seconds before 4:31 a.m. An earthquake cannot be identified as a foreshock until after a larger earthquake in the same area occurs. Today's M5.0 has so far produced approximately 20 aftershocks, of magnitude greater than M2.0. No systematic change in strain above the background noise occurred during the hours to milliseconds before the event. It is said there was thousands of aftershocks after the 1994 Northridge earthqauke about 30 km east of LA (Los Angeles). "Foreshock" and "aftershock" are relative terms. The previous M5.1 aftershock occurred on June 26, 1995.