非配筋砌体（URM）
定义
没有钢筋的砖或砌块建筑，对地震摇晃极其脆弱。非配筋砌体建筑占全世界地震死亡人数的大多数。
示例
2023年土耳其地震摧毁了数千栋非配筋砌体建筑，造成50,000多人死亡。
相关术语
相关指南
未加固砌体:最危险的建筑类型
Unreinforced masonry buildings kill more people in earthquakes than any other type. Learn the risks and how communities address this deadly legacy.
如何评估建筑物的抗震安全性
Learn to assess your building's earthquake vulnerability. A practical guide to identifying structural risks and when to hire a professional.
大地震后建筑规范的演变
Every major earthquake reveals building failures that reshape building codes. Trace the evolution of seismic design standards from 1906 to today.
2010年海地地震:灾难和救援
The 2010 M7.0 Haiti earthquake killed over 200,000 people. Learn why the devastation was so extreme and the lessons for earthquake preparedness.
1976年唐山地震:中国最严重的灾难
The 1976 M7.5 Tangshan earthquake killed an estimated 242,000 people. The deadliest earthquake of the 20th century.
1556年陕西地震:历史上最严重的地震
The 1556 Shaanxi earthquake killed approximately 830,000 people, making it the deadliest earthquake in recorded human history.
2015年尼泊尔地震:廓尔喀地震
The 2015 M7.8 Nepal earthquake devastated Kathmandu and triggered avalanches on Everest. A study in building vulnerability and international response.
1989年洛马普里埃塔地震:世界大赛地震
The 1989 M6.9 Loma Prieta earthquake struck during the World Series, collapsing freeways and exposing soft-story building dangers.
1923年关东大地震:东京的毁灭
The 1923 M7.9 Kanto earthquake destroyed Tokyo and Yokohama, killing over 140,000. The firestorms were deadlier than the shaking itself.
你需要地震保险吗?完整指南
Homeowners insurance doesn't cover earthquakes. Learn who needs earthquake insurance, what it costs, and how to decide if it's worth the premium.
相关案例研究
2023年土耳其-叙利亚地震:造成59,000人死亡的双重主震
The deadliest earthquake disaster of the 2020s, notable for its unprecedented double mainshock sequence and the subsequent criminal prosecution of contractors for building code violations.
2015年尼泊尔地震:喜马拉雅山移动,加德满都颤抖
The earthquake that demonstrated the Himalayas' ongoing collision in real time, with GPS measurements showing Nepal shifted 3 meters south, while only partially releasing centuries of accumulated tectonic strain.
2011年基督城地震:6.2级余震如何摧毁市中心
One of the few cases where an aftershock was more devastating than its mainshock, with a M6.2 at just 5 km depth producing 2.2g ground acceleration that obliterated Christchurch's city center.
2010年海地地震:7.0级地震如何造成316,000人死亡
The deadliest earthquake relative to magnitude in modern history, demonstrating that building quality and governance -- not earthquake size -- determine whether people live or die.
2008年四川地震:龙门山断层沿线87,000人死亡
The earthquake that forced China to confront endemic building code violations after thousands of 'tofu-dreg' school buildings collapsed while adjacent government structures survived, killing over 5,000 children.
常见问题解答
震中是地表上位于震源（地震破裂开始处）正上方的点。通常以经纬度坐标报告。最强的震动通常发生在震中附近，但当地土壤条件和断层几何形态可能使最大损害区域发生偏移。
地震仪（地震计）是检测和记录地震波引起的地面运动的仪器。现代宽频带地震仪可以检测到比原子宽度还小的运动。全球地震仪网络使科学家能够在几分钟内确定地震的位置和震级。
P波（纵波）是通过岩石传播最快的压缩波，最先到达地震台站。S波（横波）到达较晚但引起更大的地面震动。P波可以通过固体、液体和气体传播；S波只能通过固体传播。两者之间的时间差有助于确定地震的距离。
震源是地球内部地震破裂开始的点。它由经度、纬度和深度来描述。震源与其正上方地表之间的垂直距离即为地震深度，这对地表感受到的震动强度有很大影响。
地震学是研究地震和地震波在地球内部传播的科学学科。它包括地震检测、定位和特征描述、地球内部结构、地震危险性评估和地震工程。地震学家利用全球地震仪网络的数据来研究这些现象。