Figure 2

Local Bouguer anomaly of the (a) historic data and (b) new data set constructed using a density of 2200 kg m−3. The region in (b) is represented by a black square in (a). The values are given with respect to the reference station of the new data set (indicated with a ×-sign). The maps were created using Matlab (version R2013b; www.mathworks.com).