An earthquake is a shaking of the ground caused by the sudden breaking and shifting of large sections of Earth's rocky outer shell. Earthquakes are among the most powerful events on earth, and their results can be terrifying. A severe earthquake may release energy 10,000 times as great as that of the first atomic bomb. Rock movements during an earthquake can make rivers change their course. Earthquakes can trigger landslides that cause great damage and loss of life. Large earthquakes beneath the ocean can create a series of huge, destructive waves called tsunamis (pronounced tsoo NAH meez) that flood coasts for many miles.
Earthquakes almost never kill people directly. Instead, many deaths and injuries in earthquakes result from falling objects and the collapse of buildings, bridges, and other structures. Fire resulting from broken gas or power lines is another major danger during a quake. Spills of hazardous chemicals are also a concern during an earthquake.
The force of an earthquake depends on how much rock breaks and how far it shifts. Powerful earthquakes can shake firm ground violently for great distances. During minor earthquakes, the vibration may be no greater than the vibration caused by a passing truck.
On average, a powerful earthquake occurs less than once every two years. At least 40 moderate earthquakes cause damage somewhere in the world each year. About 40,000 to 50,000 small earthquakes--large enough to be felt but not damaging--occur annually.
Earthquakes almost never kill people directly. Instead, many deaths and injuries in earthquakes result from falling objects and the collapse of buildings, bridges, and other structures. Fire resulting from broken gas or power lines is another major danger during a quake. Spills of hazardous chemicals are also a concern during an earthquake.
The force of an earthquake depends on how much rock breaks and how far it shifts. Powerful earthquakes can shake firm ground violently for great distances. During minor earthquakes, the vibration may be no greater than the vibration caused by a passing truck.
On average, a powerful earthquake occurs less than once every two years. At least 40 moderate earthquakes cause damage somewhere in the world each year. About 40,000 to 50,000 small earthquakes--large enough to be felt but not damaging--occur annually.
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第1个回答 2015-06-08
Everyone has some unforgettable experiences.
Last Monday, there was a serious earthquake in Sichuan Province. Many people were killed. A
large number of houses collapsed. I was shocked. When I see theses pictures on TV, my eyes were
filled with tears. I wanted to do something for people in the disaster areas.
Two days later, in front of the library of our school, almost all of the teachers and students came to
donate money. I was moved. I thought although I couldn’t go to Sichuan like the soldiers and the
doctors, I still wanted to try my best to help them. I took out all my pocket money and threw it
into the donation box.
I hope they can rebuild their homeland early. It will be an unforgettable experience in my life. It
makes me experience that if everyone makes a contribution for our country, we can overcome any
difficulties.请采纳😊
Last Monday, there was a serious earthquake in Sichuan Province. Many people were killed. A
large number of houses collapsed. I was shocked. When I see theses pictures on TV, my eyes were
filled with tears. I wanted to do something for people in the disaster areas.
Two days later, in front of the library of our school, almost all of the teachers and students came to
donate money. I was moved. I thought although I couldn’t go to Sichuan like the soldiers and the
doctors, I still wanted to try my best to help them. I took out all my pocket money and threw it
into the donation box.
I hope they can rebuild their homeland early. It will be an unforgettable experience in my life. It
makes me experience that if everyone makes a contribution for our country, we can overcome any
difficulties.请采纳😊
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