6.10板内地震
Section outline
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When can you go up in the Washington Monument again?
::你什么时候能再去华盛顿纪念碑?An in August 2011 in Virginia cracked the top of the Washington Monument. After 32 months of repair, the monument reopened to the public. Other sites in Washington, D.C., like the National Cathedral, were also damaged.
::2011年8月,在弗吉尼亚州,一座纪念碑破碎了华盛顿纪念碑的顶部,经过32个月的修复后,纪念碑重新向公众开放,华盛顿特区的其他地点,如国家大教堂,也遭到破坏。Intraplate Earthquakes
::板内地震About 5% of earthquakes take place within a plate , away from plate boundaries . These intraplate earthquakes are caused by stresses within a plate. Since plates move over a spherical surface, zones of weakness are created. Intraplate earthquakes happen along these zones of weakness. The earthquakes may take place along ancient or rift zones.
::大约5%的地震发生在板块内, 远离板块边界。 这些板块内地震是由板块内的压力引起的。 由于板块在球面上移动, 形成薄弱区域 。 在这些脆弱区域发生板块内地震 。 地震可能发生在古代或裂缝区域 。2011 Virginia Earthquake
::2011年弗吉尼亚地震In August 2011, the eastern seaboard of the U.S. was rocked by a magnitude 5.8 earthquake. While not huge, most of the residents had never experienced an earthquake. Many didn't know what had happened!
::2011年8月,美国东海岸受到5.8级地震的震撼。 虽然规模不大,但大多数居民从未经历过地震。 许多人不知道发生了什么!This region is no longer part of an active plate boundary. But a few hundred million years ago, at the end of the Paleozoic, things were different. Continent- continent convergence was bringing Pangaea together. This region was being uplifted into the ancestral Appalachian mountains . There are still ancient faults that sometimes reactivate.
::该地区不再是活跃的板块边界的一部分。 但数亿年前,在Paleozoic河的尽头,情况就不同了。 大陆-大陆的汇合将潘加亚连接在一起。 该地区被提升到祖传的阿巴拉契亚山脉。 仍然有一些古老的错误有时会重新出现。New Madrid Earthquake
::新马德里地震In 1812, a magnitude 7.5 earthquake struck near New Madrid, Missouri. The earthquake was strongly felt over approximately 50,000 square miles. The quake even altered the course of the Mississippi River . Because very few people lived in the area at the time, only 20 people died. Many more people live there today ( Figure ). A similar earthquake today would undoubtedly kill many people and cause a great deal of property damage. The New Madrid Seismic Zone continues to be active.
::1812年,在密苏里州新马德里附近发生了7.5级地震,地震强烈地感受到了大约5万平方英里的地震。地震甚至改变了密西西比河的走向。由于当时生活在这一地区的人很少,因此只有20人死亡。今天住在那里的人更多(图 ) 。 今天类似的地震无疑会杀死许多人并造成巨大的财产损失。 新的马德里地震区继续活跃。The New Madrid seismic zone is located in the interior of the North American plate (near Missouri, Arkansas, Tennessee, Kentucky, and Illinois).
::新马德里地震区位于北美板块的内部(密苏里、阿肯色、田纳西、肯塔基和伊利诺伊)。Summary
::摘要- Intraplate earthquakes occur because solid lithosphere travels on a round planet.
::发生板内地震是因为固体岩层在环行星上流动。
- Intraplate earthquakes hit reactivated ancient faults.
::内爆地震袭击了重现的古代断层。
- Intraplate earthquakes are not usually as large as quakes along plate boundaries. Still, they can do a great deal of damage.
::板块内地震通常不会像板块边界上的地震那么大。 但是,它们仍然可以造成巨大的破坏。
Review
::回顾- What caused the New Madrid earthquakes?
::是什么导致了新马德里地震?
- What causes intraplate earthquakes?
::是什么导致板内地震?
- Why did an earthquake strike Virginia in 2011? Why did it strike at that location?
::为什么2011年弗吉尼亚州发生地震?
Explore More
::探索更多Use the resource below to answer the questions that follow.
::利用以下资源回答以下问题。- How many active earthquake fault zones are there in the United States?
::美国有多少活跃的地震断层区?
- What is the second most active fault zone in the United States?
::美国第二个最活跃的断层区是什么?
- When did the New Madrid earthquake occur?
::何时发生新马德里地震?
- What was the magnitude of the New Madrid earthquake?
::新马德里地震的规模有多大?
- How many aftershocks occurred? What was the highest magnitude of an aftershock?
::发生了多少次余震?余震的最高程度是多少?
- How long is the New Madrid fault?
::纽约马德里的错误持续了多久?
- How many people would be affected by another quake?
::有多少人会受到另一次地震的影响?
- Where is the Ramapo fault?
::拉马波的错在哪里?
- Why is quiet along an active fault considered a problem?
::为什么对主动过错保持沉默被视为问题?
- Intraplate earthquakes occur because solid lithosphere travels on a round planet.
