In what range are the magnetic field strengths of magnetars typically measured in Gauss?

10^14 to 10^15 Gauss

Magnetars possess magnetic fields with measured strengths falling squarely within the range of $10^{14}$ to $10^{15}$ Gauss. This places them many orders of magnitude stronger than other known celestial objects or terrestrial technology. For contrast, the magnetic field measured on the surface of the Sun is approximately 1 Gauss, while powerful diagnostic equipment like a strong medical MRI machine generates fields around 30,000 Gauss. The sheer intensity of the magnetar's field is so extreme that if one passed relatively near Earth, its magnetic influence alone could cause significant disruption, potentially wiping out electronic data and altering planetary atomic structure.