CNN News:先進(jìn)地震預(yù)警系統(tǒng)是如何進(jìn)行操作的

No one was killed by the 6.0 magnitude earthquake that shook northern California on Sunday, but more than 200 people were injured. And one question being asked, is whether an advanced earthquake warning system could keep people safer. One proposed system would cause California $80 million. But if we can`t predict earthquakes, how would it work?

沒(méi)有人在周日發(fā)生在加州北部6.0級(jí)地震中死亡，但是有超過(guò)200人在地震中受傷。其中一個(gè)被問(wèn)及的問(wèn)題就是擁有一個(gè)先進(jìn)的地震預(yù)警系統(tǒng)能否保證人們的安全。一個(gè)擬議的先進(jìn)系統(tǒng)會(huì)花費(fèi)加州8000萬(wàn)美元的支出，但是如果我們不能預(yù)測(cè)地震，那么它是怎樣做到的呢?

If you in the epicenter of an earthquake, you are going to get no warning. There`s no time for that. The warning depends on the distance you are to the earthquake epicenter.

如果你在地震中心的話，你不會(huì)收到地震預(yù)警。因?yàn)闆](méi)有時(shí)間準(zhǔn)備逃跑。地震預(yù)警只對(duì)于遠(yuǎn)離震中位置的人來(lái)講才有效。

Early warning system for earthquakes is expensive and also complex. Part of the problem is, we don`t have a system that can predict the earth is going to move. Our warning system is based on the fact that the earth is already moving and then if you are farther away from that epicenter, we can give you some time to prepare. Some minor time, but some time.

早期地震預(yù)警系統(tǒng)是非常昂貴并且復(fù)雜的。其中的問(wèn)題就是，我們沒(méi)有一個(gè)可以預(yù)測(cè)出地球運(yùn)動(dòng)的系統(tǒng)。我們的預(yù)警系統(tǒng)基于地球已經(jīng)開(kāi)始進(jìn)行活動(dòng)之后發(fā)出的，如果你距離震中有一定距離的話，我們可以提供給你一些時(shí)間準(zhǔn)備逃生。只有很短的時(shí)間提供給你準(zhǔn)備。

Unlike a tornado warning where Doppler radar can see the rotation and issue a warning before the tornado, an earthquake warning happens when the earth is already shaking.

不像龍卷風(fēng)預(yù)警系統(tǒng)多普勒雷達(dá)可以看出氣旋運(yùn)動(dòng)在龍卷風(fēng)形成之前提前發(fā)出警告，而地震預(yù)警系統(tǒng)則是從地球開(kāi)始搖晃之后才發(fā)出警告。

Another limitation is how close the sensor is to the epicenter. If the sensor is ten miles away from the epicenter, it takes five seconds to get to that sensor. So, the more sensors we get, the better the lee time will get as well. If we get ten seconds notice of an earthquake that`s happening, especially a big one, you can open up the elevators on the nearest floor. You can stop trains. You can stop all those things that are moving before the shaking gets there. This entire system works because the speed of light or the speed of the warning going down the line, is 186,000 miles per second. The earth as it`s wiggling and shaking along, is going at 2 miles per second, so if you are 30 miles away, your warning could be 15 seconds.

另一個(gè)限制是距離震中的傳感器距離。如果傳感器距離震中十英里遠(yuǎn)的話，將會(huì)需要五秒的時(shí)間將感應(yīng)傳送到傳感器，所以傳感器越多我們就會(huì)得到更多的時(shí)間準(zhǔn)備逃生。如果我們需要十秒鐘來(lái)注意到地震的發(fā)生，尤其是震級(jí)較高的地震，你可以打開(kāi)距離最近地板上的電梯，你可以停止火車(chē)，你可以在地震到達(dá)之前停止所有搖晃的東西。整個(gè)工作系統(tǒng)因?yàn)楣馑倩蛘呔姘l(fā)出的速度為每秒186000英里。地球的擺動(dòng)和震動(dòng)將以每秒2英里速度移動(dòng)，如果你距離30英里以外的話，警告信息發(fā)送到你身上則需要15秒。

It`s 15 seconds I could save her life.

15秒鐘我可以挽救她的生命。