Non-monotonic growth and motion of the South Atlantic Anomaly

Earth, Planets and Space

Table 1 Mean rates of change of the SAA area in \(10^5\) \(\hbox {km}^2/\hbox {year}\) and of the coordinates of its center in \(^\circ\)/year for all models

Area	1840–1890	1890–1940	1940–2020	Total
S0	3.51	1.71	6.38	4.29
S1	3.18	0.27	4.56	2.98

Center longitude	1840–1940	1940–1980	1980–2020	Total
Min	\(-\)0.268	\(-\)0.189	\(-\)0.175	\(-\)0.229
CM0	\(-\)0.166	0.068	\(-\)0.226	\(-\)0.127
CM1	\(-\)0.177	0.087	\(-\)0.172	\(-\)0.117

Center co-latitude	1840–1900	1900–1980	1980–2020	Total
Min	0.059	0.034	0.000	0.035
CM0	\(-\)0.007	0.085	\(-\)0.021	0.031
CM1	0.000	0.096	0.007	0.044

Mean rates of change are given for specific periods motivated by Fig. 4 (see text) as well as for the entire period (denoted by ‘Total’)