def check_min_stop_time(clusters, min_s):
    """
    Filter to keep only clusters that have meet the minimum stop time criteria.
    """
    stop_clusters = []
    for cluster in clusters:
        period_s = cluster[-1].timestamp_epoch - cluster[0].timestamp_epoch
        if period_s >= min_s:
            stop_clusters.append(cluster)
    return stop_clusters
