def METHOD_NAME(fnames, forbidden):
    """
    :param fnames: a list of CSV files with fields lon,lat,vs30
    :param forbidden: forbidden name for the input files
    :returns: a vs30 array of dtype vs30dt
    """
    data = []
    for fname in fnames:
        check_fname(fname, 'vs30_csv', forbidden)
        with read(fname) as f:
            for line in f:
                data.append(tuple(line.split(',')))
    return numpy.array(data, vs30_dt)