While taking measurement of the BSC pier (50921), I bumped the yellow stand that the magnetometer is mounted on (see in image attached to this alog). There are inscription on the floor where the feet used to be located and these positions are at some distance to where the feet of the stand currently sit (and the dates are over a year old) . I don't think the feet were located in these positins to begin with and I didn't bump the stand that much, it moved it no more than 1cm.
I'm not sure if this will affect PEM measurements and Detchar thus I am tagging both. I am also unsure if a 're-alignment' is required.