A Planet's Linear Convergence with its Star, does influence the Tactonic Plate Motion, thus, the State of Gravity on the involved.
In case of Earth, like elsewhere, the Convergences do have a long term influence on the Earth's Seven Plated Tactonic Structure.
But in order to Apply the Knowledge, to precisely "predict" the Place and Time of an earthquake's occurence, would essentially depend on a "precise" Knowledge ... meaning, a well Charted Quantum of Tactonic Plate Sizes, Strengths, Speeds and Direction of the Plate Movement ... Factors, that can be influenced by Gravitational Pulls and Pushes involved in Ecliptic Alignments.
These Factors can be determined Physically and Quantified Mathematically.
But the Required Precision, is still a long way off with available Technologies, where Theoretical Mathematics, after all only has a sporting chance of being Accurate in Predicting an Eartquake's Time and Place of Occurence.