The report takes peak field strength as the highest magnitude found in the scan grid, and shows the single-point documented reading alongside it as a comparison.
Where it appears in the report: Peak Field Strength, Measurement Data
The evidence
When the full spatial scan and the single documented reading disagree by more than about 10 percent, the report shows both rather than quietly picking one. That's our convention for how the peak is defined and reported.
The field is strongest right at the coil and weakens with distance in every direction. On the on-axis dipole model the report uses, it reaches half its peak strength at about three quarters of a coil radius from center and one tenth at about two radii. A larger coil holds the field up farther out.
