📚 Case Study Practical Exercise: The 2011 Tōhoku Earthquake and Tsunami | 案例分析实战演练：2011年日本东北部地震与海啸
Case studies are at the heart of Edexcel geography. They help you move from textbook facts to real-world understanding. This article uses the 2011 Tōhoku earthquake and tsunami to show how to build a powerful case study answer – step by step, with clear information and practical tips you can use in your own assessments.
案例研究是 Edexcel 地理学的核心。它们可以帮助你从课本知识走向现实世界的理解。本文以 2011 年日本东北部地震与海啸为例，展示如何一步步构建强有力的案例分析答案——信息清晰，并提供你可以在自己的评估中使用的实用技巧。
1. Understanding the Case Study Approach | 理解案例分析方法
A geographical case study is more than just a story. It is a structured investigation that places events in their location, explains why they happened, explores their impacts, and evaluates the responses. Edexcel expects you to use specific facts, dates and key terms.
地理案例分析不仅仅是一个故事。它是一项结构化的调查，将事件置于其发生地，解释其发生的原因，探讨其影响，并评估应对措施。Edexcel 希望你使用具体的事实、日期和关键术语。
When you write a case study, always ask: Where is it? Why there? What happened? What were the effects? How did people respond? Keeping these questions in mind transforms a list of facts into a connected argument.
撰写案例分析时，始终要问：它在哪里？为什么在那里发生？发生了什么？影响是什么？人们如何应对？记住这些问题，就能将一系列事实转化为连贯的论证。
2. Location and Background of the 2011 Tōhoku Event | 2011年东北事件的位置与背景
On 11 March 2011 at 14:46 local time, a megathrust earthquake struck off the Pacific coast of northeastern Honshu, Japan’s main island. The epicentre was approximately 70 km east of the Tōhoku region, beneath the sea floor of the Japan Trench.
2011 年 3 月 11 日当地时间 14 点 46 分，日本主岛本州岛东北部太平洋沿岸发生了一次大型逆冲地震。震中位于东北地区以东约 70 公里的日本海沟海底。
The Tōhoku region includes the prefectures of Iwate, Miyagi and Fukushima. These areas are known for fishing ports, agriculture and cities such as Sendai, with a population of over one million people before the disaster.
东北地区包括岩手县、宫城县和福岛县。这些地区以渔港、农业和城市闻名，如仙台市，灾难前人口超过一百万。
The event is often called the Great East Japan Earthquake. It was the most powerful earthquake ever recorded in Japan and the fourth most powerful in the world since modern record-keeping began in 1900.
这一事件通常被称为东日本大地震。这是日本有史以来记录到的最强地震，也是自 1900 年有现代记录以来全球第四强地震。
3. Tectonic Causes: Why Japan? | 构造原因：为何发生在日本？
Japan lies on a destructive plate boundary where the Pacific Plate is subducting beneath the North American Plate (some models use the Okhotsk Plate) at a rate of about 8-9 cm per year. Over centuries, enormous pressure builds up until the plates suddenly lurch, releasing stored energy as seismic waves.
日本位于一个破坏性板块边界，太平洋板块正以每年约 8-9 厘米的速度俯冲到北美板块（某些模型使用鄂霍次克板块）之下。几个世纪以来，巨大的压力不断积累，直到板块突然错动，以地震波的形式释放储存的能量。
The rupture zone stretched over 500 km long and 200 km wide. The seafloor was displaced vertically by up to 30 metres in places, which directly triggered the devastating tsunami.
破裂带绵延超过 500 公里长、200 公里宽。海底在某些地方垂直位移高达 30 米，这直接引发了毁灭性的海啸。
Understanding plate tectonics helps geographers explain why some places experience frequent earthquakes while others do not. Year 7 maps of the Pacific Ring of Fire show Japan sitting right on this highly active zone.
理解板块构造有助于地理学家解释为什么某些地方频繁发生地震而其他地方则不会。七年级绘制的环太平洋火山带地图显示，日本恰好位于这个高度活跃的区域。
4. The Earthquake: Magnitude and Primary Effects | 地震：震级与主要影响
The main shock registered a magnitude of 9.0-9.1 Mw. Shaking lasted for approximately six minutes, causing buildings to sway violently even in Tokyo, 370 km away. Ground shaking, liquefaction and landslides were the primary effects.
主震震级为 9.0-9.1 兆瓦。震动持续了大约六分钟，导致远在 370 公里外的东京的建筑物剧烈摇晃。地面震动、液化和山体滑坡是主要影响。
Immediately, transport infrastructure was crippled: Shinkansen bullet trains were automatically halted, roads cracked, and Sendai Airport was flooded by the tsunami that followed minutes later.
交通基础设施立即瘫痪：新干线高速列车自动停车，道路开裂，而随后的海啸在几分钟内淹没了仙台机场。
Hundreds of aftershocks, many above magnitude 6.0, continued for weeks, hampering rescue efforts and keeping survivors in a state of constant fear.
数百次余震（其中许多震级超过 6.0 级）持续了数周，阻碍了救援工作，并使幸存者处于持续的恐惧之中。
5. The Devastating Tsunami | 毁灭性的海啸
The vertical displacement of the seafloor pushed up a massive volume of water, generating a series of tsunami waves. In deep water, these waves travelled at speeds of around 800 km/h, but were only a metre high.
海底的垂直位移推起了巨量的水体，产生了一系列海啸波。在深水中，这些波浪以约 800 公里/小时的速度传播，但高度仅为一米。
As the waves approached shallow coastal waters, they slowed down and grew dramatically in height. In some of the narrowest bays along the Sanriku coast, wave run-up reached a staggering 40.5 metres, the highest recorded in Japan for this event.
当波浪接近浅水沿岸时，它们减速并急剧升高。在三陆海岸一些最狭窄的海湾中，波浪爬高达到了惊人的 40.5 米，这是本次事件中日本记录到的最高值。
Entire towns such as Minamisanriku were obliterated. The tsunami penetrated up to 10 km inland along the Sendai Plain, sweeping away houses, cars and people. Over 18,000 lives were lost, with the majority of deaths caused by drowning.
南三陆町等整个城镇被摧毁。海啸沿着仙台平原深入内陆达 10 公里，卷走了房屋、汽车和民众。超过 18,000 人丧生，其中大多数死亡是由溺水造成的。
6. The Fukushima Nuclear Emergency | 福岛核紧急情况
The tsunami inflicted a catastrophic secondary hazard: it disabled the cooling systems at the Fukushima Daiichi Nuclear Power Plant. Three reactors suffered partial meltdowns, and hydrogen explosions blew the roofs off reactor buildings.
海啸造成了一个灾难性的次生灾害：它破坏了福岛第一核电站的冷却系统。三个反应堆发生了部分熔毁，氢气爆炸掀掉了反应堆厂房的屋顶。
Radioactive material was released into the air and the Pacific Ocean. A 20-km exclusion zone was established, forcing over 150,000 residents to evacuate. Many have never returned home permanently.
放射性物质被释放到空气和太平洋中。设立了 20 公里的禁区，迫使超过 15 万居民撤离。许多人至今未能永久返回家园。
The nuclear crisis created an ‘energy geography’ shift: Japan shut down all its nuclear reactors for safety reviews, increasing its reliance on imported fossil fuels and changing the country’s environmental policy debates.
核危机造成了“能源地理”的转变：日本关闭了所有核反应堆以进行安全检查，增加了对进口化石燃料的依赖，并改变了该国的环境政策讨论。
7. Immediate Responses and Rescue Efforts | 即时反应与救援工作
Within minutes, the Japan Meteorological Agency issued tsunami warnings across the entire Pacific basin. Search and rescue teams from 28 countries arrived to assist. The Japanese Self-Defense Forces mobilised over 100,000 personnel.
几分钟内，日本气象厅向整个太平洋海盆发布了海啸警报。来自 28 个国家的搜救队前来协助。日本自卫队动员了超过 10 万名人员。
Evacuation centres were set up in schools and community halls. Supplies of food, water and blankets were distributed, though blocked roads and destroyed ports made logistics extremely challenging.
在学校和社区会堂设立了疏散中心。食品、水和毯子被分发，但被阻塞的道路和毁坏的港口使物流极具挑战性。
Despite the scale, Japan’s strict building codes saved many lives. Regular earthquake drills meant that people knew to ‘drop, cover and hold on’ during the shaking, and to move to higher ground immediately after.
尽管规模巨大，日本严格的建筑规范挽救了许多生命。定期的防震演习意味着人们知道在震动中要“蹲下、掩护并抓牢”，并且之后要立即转移到高地。
8. Long-term Recovery and Reconstruction | 长期恢复与重建
Reconstruction was a massive undertaking. The government launched a 10-year recovery programme funded by over 32 trillion yen. Coastal defences were redesigned, with higher seawalls and tsunami gates installed in many locations.
重建是一项浩大的工程。政府启动了一项为期十年、斥资超过 32 万亿日元的恢复计划。海岸防御被重新设计，在许多地方建造了更高的防波堤和海啸闸门。
Some communities chose to relocate entire settlements to elevated land, creating new ‘resilient towns’. Fishery cooperatives rebuilt ports and fish processing plants, supporting the revival of local economies.
一些社区选择将整个定居点搬迁到高地，创建新的“韧性城镇”。渔业合作社重建了港口和鱼类加工厂，支持地方经济的复兴。
Infrastructure such as the Tohoku Shinkansen was fully repaired within months, but mental health recovery has taken much longer. Memorial parks and museums now serve as educational tools for future generations.
东北新干线等基础设施在数月内完全修复，但心理健康恢复却需要长得多的时间。纪念公园和博物馆现在作为教育工具，服务于后代。
9. Impacts Analysis: Social, Economic and Environmental | 影响分析：社会、经济与环境
Geographers categorise impacts to understand the full picture. Here is a summary table of the key social, economic and environmental impacts of the 2011 event:
地理学家对影响进行分类以全面了解。以下是 2011 年事件主要的社会、经济和环境影响汇总表：
| Category | 类别 | Key Impacts | 主要影响 |
|---|---|
| Social / 社会 | Over 18,000 dead or missing; 500,000 displaced; severe trauma. |
| Economic / 经济 | Cost exceeded US$235 billion; damage to factories, ports and farmland; global supply chain disruption. |
| Environmental / 环境 | Coastal ecosystems destroyed; radioactive contamination of land and sea; debris swept into the Pacific. |
The tsunami also created a secondary economic geography issue: millions of tonnes of debris floated across the ocean, reaching the west coast of North America, affecting marine ecosystems and requiring costly clean-ups.
海啸还造成了一个次生经济地理问题：数百万吨的残骸漂浮过洋，到达北美西海岸，影响海洋生态系统并需要昂贵的清理费用。
10. Applying Geographical Skills to the Case Study | 运用地理技能分析案例
In Edexcel Year 7 assessments, you might be given a map of plate boundaries, a graph of earthquake frequency or a photo of tsunami damage. Practise reading these geographical sources by identifying patterns and suggesting reasons.
在 Edexcel 七年级的评估中，你可能会看到板块边界地图、地震频率图表或海啸破坏的照片。通过识别模式并提出原因来练习阅读这些地理资料。
For example, a map showing the epicentre and aftershock distribution helps explain the direction of plate movement. A population density chart of the Sendai Plain explains why the human impact was so severe. Use data to support your points.
例如，显示震中和余震分布的地图有助于解释板块运动的方向。仙台平原的人口密度图解释了为何人员影响如此严重。使用数据来支持你的观点。
When you revise, create a mind map of the Tōhoku case study using the headings: Location, Causes, Effects (primary and secondary), Responses (short-term and long-term). This structure will help you answer exam questions concisely and confidently.
复习时，使用以下标题制作东北案例研究的思维导图：位置、原因、影响（主要和次生）、应对（短期和长期）。这种结构将帮助你简洁自信地回答考试问题。
Published by TutorHao | Geography Revision Series | aleveler.com
更多咨询请联系16621398022（同微信）
屏轩国际教育cambridge primary/secondary checkpoint, cat4, ukiset,ukcat,igcse,alevel,PAT,STEP,MAT, ibdp,ap,ssat,sat,sat2课程辅导，国外大学本科硕士研究生博士课程论文辅导