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Table 1 Amplitude of the diurnal variation for quiet (Sq) and disturbed (SD) days at Ebro Observatory and their equivalence in displacement on the magnetograms

From: Uncertainty in hourly mean data from classical magnetometers

 Sq (nT)Sq (mm)SD (nT)SD (mm)
Delta X (nT)102.22357.77
Delta Y (nT)456.25456.25
Delta Z (nT)202.29202.29