新闻
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170819/31129125_2.html
Server: cms-8-252
Date: 2024/11/05 22:38:08

Powered by China
China

从地震预警到地震预测还有多远(假日观察)

2017-08-19 06:16:44   中国青年网

同时,这也可以理解为什么预警也有“盲区”。一般认为,地震预警系统对距离破裂断层大于50千米的范围有效。对于50千米以内的地区,即使发出预警可能也来不及反应。而对于200千米以外的地区,一般地震产生的破坏可能不严重,就没有太大的必要发出预警,以避免造成不必要的恐慌。

强震时,预警实效更大

在强地震发生时,就是这短短的“读秒”却可以带来更多生存的希望。周荣军介绍说,“有破坏有预警”,在遭遇强地震时,预警的防震实效更能得以体现。

此外,对于高速交通(如高铁、民航、地铁等)和重要的建筑设施(如核电站、水电大坝等),地震预警系统十分必要。在几秒钟内,紧急关停、减速停车等应对,可以阻止或减轻次生灾害的发生。

据介绍,目前我国已经启动对于重要设施等的地震预警系统的建设。

地球的运动从未停止

地震是地球内部物质运动所造成的地面震动,是一种自然现象。而地球从未停止过运动,所以地球上天天都有地震发生,数量大约在每天1万次左右,全球每年发生的地震也有500万次之多。但这些地震绝大多数是人们感觉不到的小地震。据统计,6级以上的强震每年发生10到200次,7级以上的大震平均每年发生18次,8级及以上的巨大地震平均每年1到2次。

按照国际通用的里氏分级表,震级共分9个等级,是以地震仪测定的地震时所释放的能量多少来确定的。地震愈大,震级越高,每差一级,地震释放的能量约差32倍。小于3.0级时,一般不会觉察到大地的震动,5.0级以上破坏程度就大得多了。

我国处于两大地震带交接地区,是地震多发国家,这更提醒我们要了解防震减灾知识,掌握自救技能。

上一页2/2下一页
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170819/31129125_2.html
Server: cms-8-252
Date: 2024/11/05 22:38:08

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170819/31129125_2.html
Server: cms-8-252
Date: 2024/11/05 22:38:08

Powered by China
China

相关阅读

404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170819/31129125_2.html
Server: cms-8-252
Date: 2024/11/05 22:38:08

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170819/31129125_2.html
Server: cms-8-252
Date: 2024/11/05 22:38:08

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170819/31129125_2.html
Server: cms-8-252
Date: 2024/11/05 22:38:08

Powered by China
China
分享到:
0 0
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170819/31129125_2.html
Server: cms-8-252
Date: 2024/11/05 22:38:08

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170819/31129125_2.html
Server: cms-8-252
Date: 2024/11/05 22:38:08

Powered by China
China

美图推荐

404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170819/31129125_2.html
Server: cms-8-252
Date: 2024/11/05 22:38:08

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170819/31129125_2.html
Server: cms-8-252
Date: 2024/11/05 22:38:08

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170819/31129125_2.html
Server: cms-8-252
Date: 2024/11/05 22:38:08

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170819/31129125_2.html
Server: cms-8-252
Date: 2024/11/05 22:38:08

Powered by China
China

为您推荐

加载更多>>
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170819/31129125_2.html
Server: cms-8-252
Date: 2024/11/05 22:38:08

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170819/31129125_2.html
Server: cms-8-252
Date: 2024/11/05 22:38:08

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170819/31129125_2.html
Server: cms-8-252
Date: 2024/11/05 22:38:08

Powered by China
China