I just check quickly log files of the geophones. The files include directions of north measured by itself. Many values are deviated from north (0 deg). Further analysis is needed, including polarity of P wave. Histogram above is made using 'Booting eCompass' in the files 'DigiSolo.LOG'.
$) grep 'Booting eCompass' /nfs/anystor/hbim/06.geophone2020.20210110/raw/*/*/DigiSolo.LOG
Updated on 21 July 2021, adding how the histogram is made.