import numpy as np

def surfdisp96(
    _thk: np.ndarray,
    _vp: np.ndarray,
    _vs: np.ndarray,
    _rho: np.ndarray,
    nlayers: int,
    iflsph: int,
    iwave: int,
    mode: int,
    igr: int,
    kmax: int,
    t: np.ndarray,
    result: np.ndarray,
) -> None: ...
