  A promising signature of coalescing black holes is their spin angular
distribution. We consider the aLIGO collaboration gravitational wave
measurements of the binary black hole spins and the predicted modified gravity
(MOG) preference for misaligned spins of the coalescing black holes. In MOG,
during the merger of two black holes, the enhanced strength of gravitation
reduces the effective spin parameter $\chi_{\rm eff}\sim 0$ in agreement with
the measured spin misalignment of the merging black holes observed in the
gravitational wave detections by the aLIGO collaboration.
