DC magnetic field conditions^a.

aData are mean±s.d. of measurement reads at the same layer; bNet DC magnetic field (the vector sum of the three directions); cPositive direction of the X-axis is pointing from South to North; dPositive direction of the Y-axis is pointing from West to East; ePositive direction of the Z-axis is pointing vertically downward; fData are from the measurement reads from the cell culture area (|B|<200 nT); gThe reference geomagnetic field in another cell incubator.