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九寨沟地震:“地震预警系统”提前71秒发出预警

2017-08-09 16:35:10   央广网

央广网成都8月9日消息(记者刘涛 实习生苏星)9日上午,记者从成都高新减灾研究所获悉,由阿坝州防震减灾局和成都高新减灾研究所(减灾所)联合建设的地震预警系统成功预警四川九寨沟7.0级地震,其中通过手机、专用终端等为成都市提前71秒预警,为甘肃陇南市提前19秒预警。

  据数据表明,地震预警系统为距震中107千米的陇南市,预警时间19秒;为距震中207千米的阿坝市,预警时间48秒;为距震中207千米的广元市,预警时间48秒;为距震中208千米的绵阳市,预警时间49秒;还为四川省广元市、成都市、绵阳市、阿坝市、甘肃省陇南市、陕西省汉中市等6个市的11所学校提前5秒-38秒发出预警。同时,汶川、茂县、北川还提前发布了电视预警信息,此外,预警系统还通过包括四川科技等近20个政务微博发布了地震预警信息,也为国家减灾中心、国家预警信息发布中心等提前预警了该地震。   地震后,成都高新减灾研究所为地震部门和应急部门提供了烈度速报图等应急数据。 四川省地震预警重点实验室主任、成都高新减灾研究所所长王暾博士向记者解释,地震预警系统分为地震监测,预警信息分析和处理,预警信息发布,以及预警信息接收和应用四个环节。而地震预警的原理,就是通过在主要地震区布设密集的(台站间距15-20公里)地震预警监测仪(烈度仪),在地震发生时,利用电波比地震波传播速度快的原理,在地震造成破坏之前,通过手机、微博、应急广播和专用接收终端等,提前几秒到几十秒为用户提供地震预警警报,民众就可以据此及时避险减少伤亡,重要工程也可紧急处置,以减少经济损失和次生灾害。  记者通过电话采访到了家住汶川县的许先生,徐先生表示,当时和妻子正在看新闻,突然电视画面弹出了一个对话框,框里写着“四川九寨沟正发生地震,汶川将有震感,请做好避险准备,地震还有多少秒到达”的字样,自己也听到了警报,就立即和妻子躲进了卫生间避险,没过一会儿,就感受到了明显震动。 王暾博士表示,地震预警仍然有盲区。所谓预警盲区,是指台站接收到地震信息,发出无线电预警信息时,地震横波已经抵达的区域。当然,盲区半径越小,收到预警信息的人就越多。目前,我国的地震预警盲区为20公里左右,在地震预警盲区方面,优于日本。   “成都高新减灾研究所与全国31个省份的市、县地震部门合作建设的地震预警网该地震预警网覆盖面积达220万平方公里,占我国人口密集的多震区面积的90%,也已经持续为多领域和多行业提供地震预警服务。并且已成功预警芦山、鲁甸、康定等38次破坏性地震,没有一次漏报、错报。”王暾博士表示, 但从总体上看,地震预警信息接收仍是“软肋”。虽然我国地震预警网已覆盖6.6亿人口,但能够真正应用地震预警信息的人口不到2%。   王暾博士表示,地震预警是社会工程,减灾所在地震预警领域所取得的成果是在各级党委、政府的领导、支持下取得的,是社会各界的积极支持和共同参与下取得的。减灾所希望在地震预警领域实践中国地震局提出的充分利用社会力量和市场机制,形成资源共享、互利共赢的防震减灾事业发展新格局。具体的,希望中国地震局与地震预警领域的社会力量的典型代表——减灾所形成合力,充分利用我国已建成的覆盖我国地震区人口90%的地震预警网,保障我国地震安全。 记者了解到,目前,成都地铁已安装了地震预警服务系统。

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