美国有线新闻 CNN 美国阿拉斯加发生7.9级地震 已发布海啸预警

美国阿拉斯加发生7.9级地震 已发布海啸预警

AZUZ: Just after midnight on Tuesday, the earth jolted¹ beneath the Gulf² of Alaska. This is a Pacific body of water surrounded by southern Alaska.

The earthquake that hit there was powerful, magnitude 7.9. The U.S. Geological Survey says only about three quakes that strong hit the earth in an average year. And it was felt about 175 miles away in the southern Alaska city of Kodiak.

Residents described the tremor³ as a long slow roll. And though siren sounded and classes were cancelled so schools could serve as emergency shelters, no major damage was reported. Still, people in Kodiak evacuated⁴ their homes and headed for high ground.

The reason: a tsunami⁵ warning. Earthquakes at sea don't just bring the threat of shaking. This one brought fears of dangerous tsunami waves from the Gulf of Alaska to Hawaii, and the west coast of the U.S. and Canada.

Some people in California were warned to avoid the coastline for 12 hours. Thankfully, the only tsunami waves actually seen were in Alaska and they were small, less than a foot high. Meteorologists say the type of quake that occurred yesterday was the result of a strike-slip fault, when two plates move horizontally against each other. It's not believed to be as dangerous as a thrust fault, when the plate jolts⁶ vertically⁷. That can produce major tsunami waves.

SUBTITLE⁸: What is a tsunami?

JENNIFER GRAY, AMS METEOROLOGIST: Tsunami waves or seismic⁹ sea waves are a series of waves, not just one that are created when there's an underwater disturbance¹⁰, like an earthquake or a volcanic¹¹ eruption¹².

When an earthquake strikes, the erratic¹³ movement of the ocean floor can generate a tsunami. The first wave in this series can occur within minutes of the earthquake or hours. Areas that are closest to the epicenter will experience the waves much sooner than areas far away.

One warning sign of a tsunami is water right along the coast rapidly receding¹⁴. If you see this or find yourself in a tsunami warned area, seek higher ground immediately and get as far away from the coast as you can. Make sure you stay in that safe place until the tsunami threat has ended.

1 jolted   

（使）摇动， （使）震惊( jolt的过去式和过去分词 )

参考例句：

• The truck jolted and rattled over the rough ground. 卡车嘎吱嘎吱地在凹凸不平的地面上颠簸而行。
• She was jolted out of her reverie as the door opened. 门一开就把她从幻想中惊醒。

2 gulf   

n.海湾；深渊，鸿沟；分歧，隔阂

参考例句：

• The gulf between the two leaders cannot be bridged.两位领导人之间的鸿沟难以跨越。
• There is a gulf between the two cities.这两座城市间有个海湾。

3 tremor   

n.震动，颤动，战栗，兴奋，地震

参考例句：

• There was a slight tremor in his voice.他的声音有点颤抖。
• A slight earth tremor was felt in California.加利福尼亚发生了轻微的地震。

4 evacuated   

撤退者的

参考例句：

• Police evacuated nearby buildings. 警方已将附近大楼的居民疏散。
• The fireman evacuated the guests from the burning hotel. 消防队员把客人们从燃烧着的旅馆中撤出来。

5 tsunami   

n.海啸

参考例句：

• Powerful quake sparks tsunami warning in Japan.大地震触发了日本的海啸预警。
• Coastlines all around the Indian Ocean inundated by a huge tsunami.大海啸把印度洋沿岸地区都淹没了。

6 jolts   

（使）摇动， （使）震惊( jolt的名词复数 )

参考例句：

• He found that out when he got a few terrific jolts, but he wouldn't give up. 被狠狠地撞回来几次后，他发觉了这一点，但他决不因此罢休。
• Some power bars are loaded with carbohydrates or caffeine for quick jolts. 有些能量条中包含大量的碳水化合物和咖啡因，以达到快速提神的效果。

7 vertically   

adv.垂直地

参考例句：

• Line the pages for the graph both horizontally and vertically.在这几页上同时画上横线和竖线，以便制作图表。
• The human brain is divided vertically down the middle into two hemispheres.人脑从中央垂直地分为两半球。

8 subtitle   

n.副题（书本中的），说明对白的字幕

参考例句：

• His new book has a subtitle.他的新书有一个副标题。
• Ah!I don't know why they don't subtitle these movies.唉！我不知道这些电影为什么不打字幕。

9 seismic   

a.地震的，地震强度的

参考例句：

• Earthquakes produce two types of seismic waves.地震产生两种地震波。
• The latest seismic activity was also felt in northern Kenya.肯尼亚北部也感觉到了最近的地震活动。

10 disturbance   

n.动乱，骚动；打扰，干扰；(身心)失调

参考例句：

• He is suffering an emotional disturbance.他的情绪受到了困扰。
• You can work in here without any disturbance.在这儿你可不受任何干扰地工作。

11 volcanic   

adj.火山的；象火山的；由火山引起的

参考例句：

• There have been several volcanic eruptions this year.今年火山爆发了好几次。
• Volcanic activity has created thermal springs and boiling mud pools.火山活动产生了温泉和沸腾的泥浆池。

12 eruption   

n.火山爆发；（战争等）爆发；（疾病等）发作

参考例句：

• The temple was destroyed in the violent eruption of 1470 BC.庙宇在公元前1470年猛烈的火山爆发中摧毁了。
• The eruption of a volcano is spontaneous.火山的爆发是自发的。

13 erratic   

adj.古怪的，反复无常的，不稳定的

参考例句：

• The old man had always been cranky and erratic.那老头儿性情古怪,反复无常。
• The erratic fluctuation of market prices is in consequence of unstable economy.经济波动致使市场物价忽起忽落。

14 receding   

v.逐渐远离( recede的现在分词 )；向后倾斜；自原处后退或避开别人的注视；尤指问题

参考例句：

• Desperately he struck out after the receding lights of the yacht. 游艇的灯光渐去渐远，他拼命划水追赶。 来自辞典例句
• Sounds produced by vehicles receding from us seem lower-pitched than usual. 渐渐远离我们的运载工具发出的声似乎比平常的音调低。 来自辞典例句