  A comprehensive study of the vortex phases and vortex dynamics is presented
for a recently discovered high-temperature superconductor ThH$_{10}$ with
$\textit{T}$$_C$ = 153 K at 170 GPa. The obtained results strongly suggest a
quasi two-dimensional (2D) character of the vortex glass phase transition in
ThH$_{10}$. The activation energy yields a logarithmic dependence
$\textit{U}$$_0$ $\propto$ ln($\textit{H}$) on magnetic field in a low field
region and a power law dependence $\textit{U}$$_0$ ~ $\textit{H}$$^{-1}$ in a
high field region, signaling a crossover from 2D regime to 3D collective
pinning regime, respectively. Additionally, a pinning force field dependence
showcases dominance of surface-type pinning in the vicinity of
$\textit{T}$$_C$. Thermal activation energy ($\textit{U}$$_0$), derived within
thermally activated flux flow (TAFF) theory, takes very high values above
2$\times$10$^5$ K together with the Ginzburg number $\textit{Gi}$ = 0.039 -
0.085, which is lower only than those of BiSrCaCuO cuprates and 10-3-8 family
of iron based superconductor. This indicates the enormous role of thermal
fluctuations in the dynamics of the vortex lattice of superhydrides, the
physics of which is similar to the physics of unconventional high-temperature
superconductors.
