Fig. 9

Lithospheric field update at the level of Afghanistan. Top left: prior mean downward component in 2006.0 expanded up to \(\ell =1000\). Bottom left: locations of airborne intensity measurements taken in 2006 (blue dots) and 2008 (red dots). The second to the fourth map on the top show different models of the downward component of the lithospheric field. These are, respectively, from from left to right, the posterior mean expanded up to \(\ell = 2000\), the EMM model by Maus (2010) taken up to \(\ell =790\) and posterior mean truncated at \(\ell = 790\). Under each solution, the absolute value of the difference between measured intensities and predicted ones is shown. For predictions, the Kalmag mean core field was included. The values given on the bottom left of these maps correspond to the r.m.s. values of the differences between the model and the data