Based on coseismic water-level responses recorded at four observation wells in Shandong Province—Liaogu-1, Qixia Lu-07, Shanghe Lu-09, and Heze Lu-27—triggered by the M7.9 Myanmar earthquake on 28 March 2025, this study investigates the temporal, amplitude, and spectral characteristics of well responses. By comparing the coupling differences between water seismic waves and ground seismic waves, and by jointly inverting aquifer hydrogeological conditions using tidal response parameters of well water levels, the factors controlling the differentiation of response modes are explored. The results reveal pronounced differences in coseismic water-level responses among the four wells, which can be broadly classified into two categories: oscillatory and step-like(step-up)response modes. These two modes exhibit significant contrasts in temporal correspondence, correlation strength, and in the characteristics of the associated tidal response parameters, including tidal factors and phase differences, between water seismic waves and seismic waves. Aquifer hydrogeological properties are identified as the primary controls on response-mode differentiation. Variations in transmissivity and storage coefficient alter fluid flow regimes and pressure adjustment processes, thereby giving rise to distinct response behaviors. In addition, well construction characteristics(such as casing depth)and anthropogenic influences(e.g., long-term groundwater pumping)can modify local hydrogeological conditions and thus affect the detailed features of coseismic water-level responses. These findings enhance the understanding of well-aquifer-seismic wave interactions and provide important constraints for interpreting coseismic hydrological signals.