“…This is because the shear velocity is higher than the Alfvén velocity, v A ≡ B/ 4πρ, with the magnetic field strength, B, and density, ρ, at the basis of the crust, which leads to the oscillations being controlled by shear properties. In general, the critical field strength, above which magnetic oscillations become dominant, depends on the EOS (or crust properties), which is considered around a few times 10 14 G [79,81,103]. Therefore, to avoid uncertainty in the magnetic geometry and profile, assuming that the field strength is not so strong, we focus on only crustal oscillations without magnetic effects in this review.…”