Back in the 1980s Leonardo "Nano" Seeber and Craig Nicholson and others published several papers on the cross faults between the San Jacinto fault and San Andreas fault. There should be vertical axis clockwise rotations as a result of this fault patter (I assume this rotation had been shown by paleomagnetic measurements, but am not sure). You expect such rotation and just the left slip to weaken the NW-SE faults at one side of the intersections. I would expect (but could be wrong) that if the NE-SW fault that has been activated intersects a N-S right-lateral fault that splits off of the San Andreas, that this N-S fault would be weakened north of the intersection (unclamped...or less normal stress to hold it together). But, there will be people who will do the static stress calculations and make maps, I assume.

I talked to Nano and he agreed that right-lateral faults split off of the San Andreas proper and come through the Brawley zone.
The most recent of the larger quakes, the 4.8 and a later 4.9, were normal slip.

The swarm seems to have quieted down.
Chris