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研发人员独家揭秘:九寨沟地震前手机为何能提前40秒收到预警?

2017-08-09 22:34:39   央广网

  

“地震预警”app对此次地震进行了预警和速报”

“地震预警的过程复杂,但其实整个过程就几秒钟就完成了。震中地震后6、7秒钟地震预警网就发出警报,它是一个全自动的过程。”王暾解释说,提前预警只是针对于地震波还没有波及的地区,而不是针对震中。对震中而言,震中在地震预警网发出预警时其实已经发生地震了。

记者下载“地震预警”软件体验发现,如果手机屏幕显示前方发生地震倒计时时,手机就会嗡嗡作响。记者还了解到,该系统采用ICL地震预警技术,在地震高危区域布设相对密集的地震预警监测台网,监测仪将监测到的地震动关键信息发送至地震预警中心进行自动分析和处理,然后地震预警中心自动发布预警信息,用户接收预警信息并进行避险和紧急处置。

王暾举例说,地震预警就像水波逐渐在向前推动,到达岸边前,我们就已经知道它将会波及到岸边,同理,把震波的信号及时通过网络传到用户,在地震波在向外传的时候,其实我们已经收到了。

“地震预警是指地震在震中发生时,破坏性地震波在到达预警目标前,利用电波比地震波快的原理,在灾难到来前几秒到几十秒给出警报的技术。”此前,成都高新减灾研究所办公室主任欧垫竹接受媒体采访时介绍说,比如说在北京,如果唐山发生地震,破坏性地震波还没有到达北京之前,这预警信息就已经发到你的手机上了,告诉你唐山已经地震了民众还有多少秒的时间可以利用。

 成都高新减灾所答疑:何为地震预警盲区?

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