Abstract: The starting magnitude is one of the core parameters that determine the scanning results of the solid tide modulation ratio. Currently, the modulation ratio scanning analysis of solid tides is mostly based on a single, specific magnitude as the benchmark, and comparative studies of scanning results across bins of different magnitudes remain scarce. On January 10 and July 25, 2025, two earthquakes with magnitudes of 4.1 and 4.2 occurred consecutively in the southern section of the Fenwei fault zone in Linfen, Shanxi Province, within a six-month period, attracting the attention of seismologists. We scanned the solid tide modulation ratio images for the M_L1.7 and M_L2.5 magnitude ranges before the Linfen, Shanxi M4.1 and M4.2 earthquakes. The results show significant differences in the abnormal evolutionary characteristics of the solid tide modulation ratio across different magnitude ranges. As the initial scanning magnitude increased, the range of the high-value anomaly in the solid tide modulation ratio expanded, and its amplitude increased. Meanwhile, the correlation between the epicenter location and occurrence time becomes stronger. The high modulation ratio anomalies of solid tide obtained from pre-earthquake scanning are primarily attributed to the modulation effect of earthquakes M_L≥2.5. Therefore, when using the solid tide modulation ratio method for earthquake tracking, an appropriate starting magnitude for the study area should be selected through a comparative analysis across multiple magnitude bins.