Back to the drawing board with this idea. The weather is still sultry
here in the UK but:

2003/07/16 02:29:48 2.67S 68.39E 10.0 5.6 CARLSBERG RIDGE
2003/07/15 20:27:50 2.56S 68.30E 10.0 7.6 CARLSBERG RIDGE
2003/07/15 18:46:37 3.82S 152.15E 33.0 6.4 NEW IRELAND REGION, P.N.G.

I wonder why the first quake is usually the heaviest. At a guess I'd
say one possible explanation is that the likely area for a quake is
settled by the first shock and the next one to go is not so well
primed.

Another is that not all the charge is released at once and the
realignment of the strata allows a new event in the region. I think
this likely if the true trigger is a pietzo-electrical effect. (Sound
transformed into electricity.)

There must be a more rational explanation to the ones propounded most
often on this site. Which if they were in any way remotely possible,
would begin with trickles in the same way that landslides do.