Presumably the tectonic setting and local geology near the well are also important factors for permeability change. Thus, some sensitive wells located in far field can still show permeability changes while some wells may be less sensitive even if they are closer to the epicenter. We also document changes in the amplitude of tidal responses for wells with a phase shift (Fig.6), but changes are proportionally smaller (Ta-bles S1, S2). Tidal amplitude depends on the mechanical properties of aquifer such as undrained compressibility, Poisson’s ratio and fluid compressibility