__ TOC __ Not every earthquake results in surface rupture , particularly for smaller and deeper earthquakes . . In some cases , however , the lack of surface effects is because the fault that moved does not reach the surface . For example , the 1994 Northridge earthquake had a moment magnitude of 6.7 , caused major damage in the Los Angeles area , occurred at below the Earth 's surface , but did not cause surface rupture , because it was a blind thrust earthquake
1994 Northridge earthquake
1994 Northridge earthquake
Surface rupture