  The High Altitude Water Cherenkov (HAWC) array is sensitive to high energy
Cosmic Rays (CR) in the $\sim 10$ to $\sim 200$ TeV energy range, making it
possible to construct maps of the so called "Sun Shadow" ($SS$), i. e. of the
deficit of CR coming from the direction of the Sun. In this work, we present
the variation of the Relative Intensity of the deficit ($SS_{RI}$) for three
years of HAWC observations form 2016 to 2018 in which we found a clear
decreasing trend of the ($SS_{RI}$) over the studied period, corresponding to
the declining phase of the solar cycle 24. By comparing the $SS_{RI}$ with the
photospheric magnetic field evolution, we show that there is a linear
relationship between the $SS_{RI}$ and the median photospheric magnetic field
of the Active Region belt (-40$^\circ \le$ lat $\le$ 40$^\circ$) and a inverse
linear relationship with the polar photospheric magnetic field (lat $\ge \pm$
60$^\circ$). The former relationship is due to the magnetic field causing a
deviation of the CR, whereas the latter reflects the change of the heliospheric
field topology from multipolar to dipolar configurations. These relationships
are valid only when the median magnetic field is lower than 8 G, during the
declining and minimum phases of the solar cycle 24. Finally, we show that
relativistic charged particles, in the 10 to 200 TeV energy range, are
deflected a few degrees.
