Seismological and Hydrogeological Controls on New Zealand-Wide Groundwater Level Changes Induced by the 2016 M_w 7.8 Kaikōura Earthquake

Figure 9

WLC/PGA as a function of monitoring well depth. Coloured according to monitoring well type (water-table, nonflowing artesian, and flowing artesian). The deeper the monitoring well, the more sensitive the well was to water level change. All types of water level response (increase, decrease, transient, and no change) were observed over the entire depth range. Artesian wells commonly show water level increases at high WLC/PGA.