Dear bB,
i have a news to share with you...
美國‧智利強震震歪地軸‧地球自轉快了‧日子短了
國際 2010-03-03 15:27
【圖話故事‧老虎鞭炮】虎年將至,香港一商家大手筆佈置商廈,迎新年氣氛越來越濃,其中大型老虎鞭炮引人注目。(圖:中新社)
(美國‧華盛頓)智利上週六(2月27日)發生的8.8級地震威力巨大,震得可能連地軸也出現偏移,導致每天的時間縮短!
美國太空總署(NASA)專家表示,智利這次大地震,令到地球地軸偏移了2.7毫角秒(相當於約8厘米),影響地球的自轉速度,以致地球的日長時間,可能縮短了1.26微秒。不過暫時還不需要調整時鐘。
地球自傳一週需時24個小時,因此地軸改變將會影響自轉時間。
地球物理學家格羅斯利用電腦模型計算智利大地震的影響,他表示這次地震能令數百公里長的岩石移動數米,改變地球質量的分佈,從而影響地球自轉的速度。
他說:“智利地震令日長時間縮短了1.26微秒(microseconds,代表百萬分之一秒的單位),地球地軸偏移了2.7毫角秒(milliarcseconds,也就是約8厘米)。有關改變很小,實際上雖很難測量出來,但可用電腦模擬出來”。
這像溜冰轉圈時,把手臂縮回來後,就會愈轉愈快。地震後地球自轉快了也是同一道理。
格羅斯發現,和2004年印尼外海的9.1級大地震比較,智利大地震對地軸的影響更大。
局部原因是因為,智利大地震的斷層線深入地層的角度,比2004年大地震稍微陡峭,這能更輕易地垂直移動地表,進而改變地軸。
太空總署說,2004年的大地震將地軸移動約7公分,使每天時間縮短6.8微秒。
專家:島嶼被推高兩米
另一方面,研究智利地質的英國地球科學專家裡特布羅克表示,有些改變比較明顯,多個島移動了,“智利第二大城市康塞普西翁附近的聖瑪麗亞島(Santa Maria Island)或因今次地震上升了兩米。那裡的岩石證據,顯示過去的地震曾把島推高”。
台灣中央大學地球科學院院長趙豐則表示,地震帶來的改變將“永遠”維持下去。
【熱點新聞:智利8.8級大地震】 星洲日報/國際‧2010.03.03
according to kris allen,"We only got 86,400 seconds in a day "but after the chile earthquake, he should change his lyrics, which is
"We only got( 86,40o-1.26 microseconds) seconds in a day"
1.26 microseconds, not even reached 1 second,
it may seems does not have a big influence in our daily life, but what if you times 100 to 1.26 microseconds?its a big sum right?
our day becomes shorter, do our life become "shorter " too?
okay okay. ignore that. although if we are not going to involved in what happened to the characters in the movie "2012" (which is 2 years later,) we still need to
We gotta tell them that we love them
While we got the chance to say
While we got the chance to say
please keep in mind that
And if your plane fell out of the skies
Who would you call with your last goodbye
Should be so careful who we live out our lives
So when we long for absolution,
There'll no one on the line, yeah
Who would you call with your last goodbye
Should be so careful who we live out our lives
So when we long for absolution,
There'll no one on the line, yeah
its normal that a human
You never know a good thing till it's gone
You never see a crash till it's head on
Why do we think we're right when we're dead wrong
You never know a good thing till it's gone
You never see a crash till it's head on
Why do we think we're right when we're dead wrong
You never know a good thing till it's gone
so people,,,,,(including u, bB!)
_Gotta live like we're dying_
_byEX_
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