On August 2^nd, China Earthquake Networks Center launched a nationwide public test for its WeChat warning service. Regions such as Guangdong, Jiangsu, and Hainan have gradually rolled out local earthquake warning services. WeChat users across the country can now activate earthquake warnings through the mini program on WeChat.

Starting today, users can search for "中国地震台网" (China Earthquake Networks Center) or "地震预警" (Earthquake Warning) on WeChat to access the mini program. By clicking "开启地震预警" (Activate Earthquake Early Warning) and allowing "地震预警通知" (Earthquake Warning Notifications) and "获取位置" (Location Access), users can subscribe to the earthquake warning service. At the press conference for the completion and acceptance of the National Earthquake Early Warning Project , China Earthquake Administration stated that this method allows users to receive earthquake warnings more conveniently and quickly, regardless of the brand or model of their mobile phones.

WeChat has built an independent, scalable messaging channel for earthquake warnings, capable of pushing messages to high-concurrency users within seconds. When an earthquake with potentially destructive impact occurs, WeChat will issue a full-screen alert, continuously reminding users to take timely precautionary measures. Additionally, users can send high-frequency sound rescue signals through the mini program to call for help if trapped. Different levels of earthquake impact correspond to different warning colors and messages. For minor impacts, notifications will only appear in the WeChat service notifications.

The National Earthquake Intensity Rapid Reporting and Early Warning Project (referred to as the "National Earthquake Early Warning Project ") was launched in 2018 and passed national acceptance on July 25th this year. The project's operation marks the completion of a new generation of independently innovated, open, and compatible earthquake monitoring and early warning technology systems in China. The overall functionality and performance have reached world-advanced levels, enabling second-level earthquake warnings in key regions and nationwide minute-level earthquake intensity reports. This provides more reliable earthquake safety assurances for high-quality economic and social development.

When an earthquake occurs, early warnings are issued by capturing the limited early earthquake signals from the epicenter through a dense network of observation stations. These signals are used to quickly estimate earthquake-related parameters and predict the subsequent earthquake motion and impact range in real time. The warning is issued before the destructive earthquake motion arrives. Utilizing the seconds to tens of seconds provided by the early warning system, the public can take measures to reduce casualties. Relevant departments can also take emergency measures for major infrastructure, lifeline projects, and important facilities, such as emergency braking of high-speed trains, timely closure of gas pipelines, shutting down nuclear reactors, stopping the operation of precision instruments, and emergency stopping of elevators at the nearest floors to prevent secondary disasters.

Source :Yangcheng Evening News

地震预警小程序全国上线

8月2日，“中国地震台网”全国微信预警服务面向公众开展公开测试。其中，广东、江苏、海南等地陆续上线了本地地震预警服务，全国微信用户可通过小程序开启地震预警。

即日起，用户在微信内搜索“中国地震台网”或“地震预警”，进入“中国地震台网”小程序，点击“开启地震预警”并允许“地震预警通知”与“获取位置”，成功添加关注地后即可开启地震预警服务。国地震局在国家地震预警工程竣工验收新闻发布会上表示，无论大家使用哪种品牌、哪种型号的手机，通过这一方式都将更加方便、快捷地接收到地震预警信息。

微信平台为地震预警构建了可弹性扩容的独立消息通路，实现了高并发量用户秒级消息推送。当发生可能造成破坏性影响的地震时，微信会发出全屏警示，持续提醒用户及时采取避险措施，以降低地震灾害影响。此外，用户还能通过小程序发出高频音呼救，在被困情况下向救援人员发出求救信号。不同影响程度的地震，对应不同的预警颜色和提示语，当地震影响较小时，仅在微信服务通知内提示。　

据悉，国家地震烈度速报与预警工程（以下简称“国家地震预警工程”）于2018年启动实施，今年7月25日正式通过国家验收。国家地震预警工程正式投入运行，标志着我国正式建成了自主创新、开放兼容的新一代地震监测预警技术系统，总体功能性能达到世界先进水平，在我国重点地区实现秒级地震预警和全国分钟级地震烈度速报能力，为经济社会高质量发展提供更加可靠的地震安全保障。

地震预警是在地震发生后，依托密集的地震观测站网，在观测记录中捕捉震中台站极其有限的早期地震信号，快速估计地震相关参数，实时预估后续地震动大小和影响范围，赶在破坏性地震动到达前，发出地震波即将到来的警报。利用地震预警系统提供的数秒至数十秒预警时间，公众可以采取避震措施减少人员伤亡，相关部门也可以对重大基础设施、生命线工程和重要生活设施采取紧急处置措施，如紧急制动高速列车、及时关闭燃气管线、关闭核反应堆、停止精密仪器操作、电梯紧急停运在最近楼层等，以避免次生灾害的发生。

文｜记者 王丹阳
译 | 郑圣浩
英文审校 | 王枥焓