Core Insights - The establishment of the first national strong motion accelerometer calibration device at the China Earthquake Administration's First Monitoring Center is aimed at enhancing the precision of earthquake monitoring [1][4]. Group 1: Strong Motion Accelerometers - Strong motion accelerometers are critical instruments for rapid earthquake intensity assessment and are currently deployed in over 5,000 units across the national seismic monitoring network, with plans to expand to over 20,000 units during the 14th Five-Year Plan [4]. - These devices capture ground vibration signals immediately after an earthquake occurs, providing essential data for determining earthquake intensity, calculating the epicenter, and identifying the time of occurrence [4][9]. Group 2: Calibration Device Features - The newly established calibration device features advanced vibration simulation capabilities and high measurement precision, capable of simulating maximum vibration intensity equivalent to a car accelerating from rest to 216 kilometers per hour in 2 seconds [8]. - It can accurately replicate ground vibrations caused by earthquakes ranging from magnitude 1 to 8, ensuring that calibrated devices can reliably respond to various earthquake intensities [8]. Group 3: Impact on Earthquake Monitoring - The calibration device's measurement error is less than 0.0002 of the earthquake magnitude, significantly below human perception limits, which enhances the scientific analysis and assessment of earthquake damage [8]. - China has built the world's largest and most comprehensive earthquake early warning network based on domestically produced high-precision instruments, which provides critical time for public safety and emergency responses in sectors like high-speed rail and precision manufacturing [9].

新华社北京12月17日电（记者赵文君）记者17日从市场监管总局获悉，市场监管总局近日批准中国 地震局第一监测中心建立全国首套强震动加速度计检定装置。 这标志着我国突破强震动加速度计检定技术，为我国防震减灾事业向"精准量化"转变奠定坚实计量 基础。 据介绍，这一装置基本覆盖陆地上8级地震可能诱发的最大地面振动，相当于一辆汽车在2秒钟内从 静止状态加速到216千米每小时，约等于F1赛车极限加速度的2倍。 凭借激光测量系统的技术优势，这一装置能感知极其细微的变化，对地震发生后震级测算精度的影 响仅为0.002级左右，可从源头上保障关键参数测量的准确可靠，提高不同地震监测台站采集数据的准 确性与可比性。（完） ...