diff --git a/src/seismic_hazard_forecasting.py b/src/seismic_hazard_forecasting.py
index a7fad20..2fc2db7 100644
--- a/src/seismic_hazard_forecasting.py
+++ b/src/seismic_hazard_forecasting.py
@@ -225,8 +225,6 @@ verbose: {verbose}")
         y_min = y.min()
         x_max = x.max()
         y_max = y.max()
-        z_min = depth.min()
-        z_max = depth.max()
 
         grid_x_max = int(ceil(x_max / grid_dim) * grid_dim)
         grid_x_min = int(floor(x_min / grid_dim) * grid_dim)