There was a swarm of three +5 Baja quakes on 10-20. A 5.9 at 4:09:44(UTC), a 5.5 at 4:15:39, then a 5.8 at 6:58:15. The interval between the first two is 6:55, the next interval is 166:15.
The 6.9 was on 10-21 at 17:53:14. The interval is 37h 44m 35s. Adding this interval to the time of the 6.9 quake leads to 10-23 at 7:37:49.
There are definitely some interesting numbers here, but I'll leave that to others.