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Earth, Planets and Space
Figure 3 | Earth, Planets and Space

Figure 3

From: Geomagnetic observatory monthly series, 1930 to 2010: empirical analysis and unmodeled signal estimation

Figure 3

Residuals to OMM series and the UMSL: example of a low-latitude site. Top to bottom: OMM series superimposed with AR-2 fit at the Alibag observatory; residuals between OMM series and the AR-2 proxy, superimposed with the LLS field model with and without periodic signals; final residuals after removing the LLS field; our estimate of the UMSL. Left to right: X, Y, and Z components.

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