There is an error in the paper “Magnetic Anomaly Due to a Vertical Right Circular Cylinder with Arbitrary Polarization”, by S. K. Singh and F. J. Sabina, Geophysics, v. 43, p. 173–178 (February, 1978). The second term of the right-hand side of equation (5) should be negative. The equation should read:
The plot of the magnetic field in Figures 2–4 is correct.
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