So the ITMX did not break lock on this smaller EQ.  Attached are the ISI T240 local channels--a couple hours around the EQ, for both ITMY & X.  Differences in the responses at these inloop T240s for these minute trends is uninformative so don't bother looking.  It is cool that the onboard vertical T240s shows the EQ shape better than the ground STS; related to the sensor correction?  The two ITMs respond ~the same in the regard.  When I compare the ITMs during the larger EQ Wednesday when the ITMX tripped, the response appears similar before the trip in the local basis from this vantage point.  Again, I attach the trends I've looked at but I think zooming in, the frequency space and cartesian basis is next.

The old geophysicist in me believes the trip is occurring with the earlier arriving s-wave, not the large amplitude surface waves.