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原标题:震前40秒,汶川电视台发出地震预警
“凭借‘地震预警系统’,我们在地震发生前40秒通过电视端提前发布预警,向汶川县电视用户迅速传达出了地震信息。”8月9日,四川省汶川县电视台总编室主任赵勇在接受《中国新闻出版广电报》记者采访时说。
8月8日21时19分,四川省阿坝州九寨沟县发生7.0级地震。其中,最先发出地震预警信号的是同属阿坝州的汶川县电视台。一段网络视频显示,正在播放的电视节目变成一段蓝底白字的地震预警画面,显示文字“地震预警系统,四川省九寨沟正在发生地震,汶川有感,请做好避险准备”,语音播报从40秒开始倒计时。
经记者向汶川县电视台核实,这一“地震预警系统”正是成都高新减灾研究所在汶川地震后,通过技术创新而实现的软硬件一体化的、具有自主知识产权的地震预警系统。
该系统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分析和处理。
据赵勇介绍,该系统与汶川县当地电视数字终端相连接,地震发生前,地震预警中心通过电视端提前发布预警信息,电视信号会自动切断,电视屏幕上的倒计时秒数在不断减少,配合人声的数字播报。声音数字到0后,电视端响起警报声。(见习记者郝天韵)
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