Thanks Canie,

A search on the catalog you pointed me to gave the following quakes since 1984:

1984/02/05 20:39:45.5 L 3.3 l 34.536 -118.905 15.7 C 31028 33 162 0 0
1984/02/11 14:25:14.5 L 3.0 l 34.536 -118.914 18.2 C 31518 37 154 0 0
1984/06/12 00:27:52.4 L 4.1 l 34.541 -118.989 11.7 C 41122 112 205 0 0
1994/04/08 17:53:31.6 L 3.6 l 34.465 -118.955 3.7 A 3162465 124 469 118 0
2000/10/12 16:51:19.1 L 3.9 l 34.563 -118.900 27.5 A 9165761 67 1017 0 0

Billion