A paper from USGS denies connection of large earthquakes to lunisolar forcing:
https://phys.org/news/2018-01-great-earthquakes-affected-moon-phases.html

What Hough doesn't acknowledge is the triggering effect. When an earthquake is triggered, it may be influenced by a small nudge due to the vicinity of the lunisolar path. Thus, she is contradicting recent research by her colleagues at the USGS:

van der Elst, Nicholas J., et al. "Fortnightly modulation of San Andreas tremor and low-frequency earthquakes." Proceedings of the National Academy of Sciences (2016): 201524316.

Delorey, Andrew A., Nicholas J. van der Elst, and Paul A. Johnson. "Tidal triggering of earthquakes suggests poroelastic behavior on the San Andreas Fault." Earth and Planetary Science Letters 460 (2017): 164-170.