def get_equivalent_distance_inslab(mag, repi, hslab):
    """
    :param float mag:
        Magnitude
    :param repi:
        A :class:`numpy.ndarray` instance containing repi values
    :param float hslab:
        Depth of the slab
    """
    area = 10**(-3.225+0.89*mag)
    radius = (area / scipy.constants.pi)**0.5
    rjb = np.max([repi-radius, np.zeros_like(repi)], axis=0)
    rrup = (rjb**2+hslab**2)**0.5
    return rjb, rrup
:param float mag:
        Magnitude
    :param repi:
        A :class:`numpy.ndarray` instance containing repi values
    :param float hslab:
        Depth of the slab