Improving Earth’s Magnetic Field Measurements by Numerical Corrections of Thermal Drifts and Man-Made Disturbances

Figure 3

(a) 1-day total field variation recorded at Budkov (BDV: black), Polom (PLM: green), and Kelčany (KEL: red). It is clearly seen that lowest-noise occurs at BDV, followed by PLM showing distant anthropogenic noise and KEL exhibiting large, fast spikes, most probably from car traffic. Offsets are caused by different site geology and instrument calibrations. (b) KEL and BDV in detail.

(a)

(b)