Lowell;

Here's what happens if I force the distance that far.

 1   Cathryn
2002/3 /30 - 2002/4 /1  34.24  -116.89 3   4.5 50  Prob. 15.1%

The following quakes match the prediction to some degree.
  DATE       TIME         LAT     LON     MAG  DIST(km)
2002/03/30 02:01:55.54  32.5105 -115.2355 3.12   245.9 Prob. 61.5%
2002/03/30 02:32:31.31  37.4673 -118.8143 2.78   398.2 Prob. 94.0%
2002/03/30 13:50:51.71  33.1947 -116.7280 3.84   117.1 Prob. 35.4%
2002/03/30 21:38:43.89  38.8530 -107.3860 3.10   990.3 Prob. 94.7%
2002/03/31 02:54:08.10  35.3590 -101.8240 2.80  1378.7 Prob. 100%
2002/04/01 06:47:37.90  38.7858 -122.7557 3.03   727.3 Prob. 90.8%

 Best date 2002/03/31 02:54:08.10  35.3590 -101.8240 2.80 .5
 Best dist 2002/03/30 13:50:51.71  33.1947 -116.7280 3.84 117.09372
 Best size 2002/03/30 13:50:51.71  33.1947 -116.7280 3.84 3.84
 Best prob 2002/03/30 13:50:51.71  33.1947 -116.7280 3.84 Prob. 35.4%