2020年山东有望地震提前5秒预警 伤亡比减少22%
九寨沟县发生7.0级地震后,年山地震预警的望地话题再一次被很多人提起。其实早在去年5月,震提本报就报道了我省正在开展“国家地震烈度速报及地震预警工程山东省分项目”建设的前秒情况。
根据当时的伤亡少报道,通过密布全省的比减1475个观测台站和通讯、数据处理系统和信息发布系统建设,年山在2020年年底前,望地可实现在破坏性地震波到达之前5秒发布地震预警,震提地震后1-2分钟内速报出地震基本参数,前秒2-5分钟内速报出地震烈度。伤亡少
省地震台网中心副主任殷海涛介绍,比减根据地震预警时间和人员伤亡关系的年山理论预测,提前3秒预警,望地人员伤亡比将减少14%;提前5秒,震提伤亡比将减少22%;提前15秒,伤亡比将减少53%。
他介绍,在地震前几秒发出预警信息,不仅可挽救生命,有关企业或机构也可以利用这短暂的时间采取一系列紧急措施,如对天然气、石油管道、核电站、高速列车等及时停止运行。如日本2011年“3·11”特大地震发生后,地震预警系统向受影响城市发布预警信息,为公众提供8-30秒的避险时间;东北新干线上27列高速运行列车及时制动停车,避免了列车出轨和重大人员伤亡。
要实现地震预警,需要依赖遍布全省的1475个观测站点。据殷海涛介绍,当时,我省的这1475个观测站点已经全部完成选点,新建站点已经完成野外勘察选址工作。除了观测系统,还要建设网络系统、数据处理中心、紧急地震信息服务系统、技术保障中心。
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