fang's profileOh Dear~~~PhotosBlogLists Tools Help
    5/20/2008

    地震云知识普及

        地震云大致分为四种,第一种是横条状的云,一般都是单条出现。这种云很像飞机飞过之后留下的痕迹,所以又有人叫做飞机云。一般预示着2周以后有地震;第二种是成波浪状或者放射状的云,一般预示着1周以后地震;第三种是垂直的向龙卷风一样,或者像无风时垂直向上的烟柱一样的云,预示着三天以后地震;第四种是固体形状的大块的或者团状的云,一般出现在地震当时或者地震发生之前。
        那么,什么样的云才是地震云呢?这种云的最大特点在于“奇”,与一般的云有着明显的区别。
        蔚蓝的天空中有时会留下一条飞机的尾迹,常见的条带状地震云很像飞机的尾迹,不过更加厚实和丰满些,它一般预示震中处于云向的垂直线上。
        另外有一种辐射状的地震云,则有数条的带状云同时相交在一点,犹如一把没有扇面的扇骨铺在空中,云的交点垂直于地面就是震中所在地。
        此外还有一种条纹状地震云,形似人的两排肋骨,根据此云判断震中较为复杂。
        地震云出现的时间以早上和傍晚居多,地震云持续的时间越长,则对应的震中就越近,地震云的长度越长,则距离发生地震的时间就越近,地震云的颜色看上去越令人恐怖,则所对应的地震强度就越强。
        目前,对于地震云的形成原因众说纷谈,虽然各有道理,但是都不能完整的解释地震前出现的这种现象,所以至今还是个谜,而且地震本身是个非常复杂的过程,所以预报地震,最好采用综合法。
        地震工作者们认为,地震即将发生时,因地热聚集于地震带,或因地震带岩石受强烈应力作用发生激烈摩擦而产生大量热量,这些热量从地表面逸出,使空气增温产生上升气流,这气流于高空形成"地震云",云的尾端指向地震发生处。也有的认为,"地震云"的必然性尚缺乏实验数据,也可能是一种巧合。究竟如何,有待进一步考证。

    Comments

    Please wait...
    Sorry, the comment you entered is too long. Please shorten it.
    You didn't enter anything. Please try again.
    Sorry, we can't add your comment right now. Please try again later.
    To add a comment, you need permission from your parent. Ask for permission
    Your parent has turned off comments.
    Sorry, we can't delete your comment right now. Please try again later.
    You've exceeded the maximum number of comments that can be left in one day. Please try again in 24 hours.
    Your account has had the ability to leave comments disabled because our systems indicate that you may be spamming other users. If you believe that your account has been disabled in error please contact Windows Live support.
    Complete the security check below to finish leaving your comment.
    The characters you type in the security check must match the characters in the picture or audio.

    To add a comment, sign in with your Windows Live ID (if you use Hotmail, Messenger, or Xbox LIVE, you have a Windows Live ID). Sign in


    Don't have a Windows Live ID? Sign up

    Trackbacks

    The trackback URL for this entry is:
    http://zhufang.spaces.live.com/blog/cns!35917B21569788F1!5965.trak
    Weblogs that reference this entry
    • None