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地震技术 重要性: 4/5

震级图

定义

USGS产品,显示地震后地面摇晃强度的分布。结合地震仪数据、地面运动模型和"你感到了吗?"报告。

示例

2023年土耳其地震的震级图显示断层区附近MMI IX+。

相关指南

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修正梅卡利烈度等级:测量你感受到的

The Modified Mercalli Intensity scale rates earthquake effects from I (not felt) to XII (total destruction). Learn what each level means.

地震基础

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.

历史事件

2023年土耳其-叙利亚地震:双重灾难

Two devastating earthquakes within hours killed over 50,000 in Turkey and Syria. The most destructive earthquake disaster of the 2020s.

历史事件

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.

历史事件

地震后的搜索和救援如何进行

Search and rescue teams race against the 72-hour survival window. Learn how urban search and rescue operates after earthquake disasters.

灾害应对

政府如何评估地震损害

Post-earthquake damage assessment uses rapid visual screening and detailed inspections. Learn how buildings get tagged green, yellow, or red.

灾害应对

全球地震计网络解释

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地震科学

地震预警系统:如何工作

Earthquake early warning provides seconds of life-saving alert. Learn how ShakeAlert, SASMEX, and Japan's system detect quakes.

地震科学

理解ShakeMap:实时烈度

ShakeMap shows earthquake shaking intensity within minutes. Learn how to read these maps and what they reveal about ground motion.

工具与技术

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。