Fig. 2
From: Unmodelled magnetic contributions in satellite-based models
a, b Residuals dH of the horizontal component H of the geomagnetic field mapped for different levels of geomagnetic activity according to Sym-H index (|Sym-H| ≤ 5 nT and |Sym-H| ≥ 20 nT, respectively); c difference of dH distribution between disturbed (|Sym-H| ≥ 20 nT) and quiet conditions (|Sym-H| ≤ 5 nT). Residuals are displayed for SM latitudes between 50° S and 50° N and the whole DLT range