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Tsunami in Southeast Asia: A Summary Report
By Rohit Gupta, Jon Lebkowsky, and Dina Mehta
At around 7AM last Sunday a rupture occurred along an undersea fault line where the Burma and India plates converge, resulting in a magnitude 9.0 earthquake, the fifth largest since scientists started recording and tracking the magnitude of earthquakes in 1899. It was the second large earthquake in the area within a week, the first being a magnitude 8.1 quake between Australia and Antarctica on December 23.
The first quake didn't cause a tsumami because it the tectonic plates slipped horizontally. However the second large event near Southeast Asia was a vertical lift, or "thrust fault," earthquake, which displaced a significant amount of ocean water, triggering tsunamis east and west from the fault line. The force of the tsunmai was undersea, and was therefore not that noticeable from the surface until the waves approached land.
Near landfall the waves, which would have been moving hundreds of miles an hour, slowed and grew as large as two stories in height, according to witnesses. With the catastrophic force of the waves striking without warning, the loss of life and property was significant.
The loss of life was largely preventable had a tsunami detection system been in place. However, that wasn't the case, because tsunamis are rare in the Indian Ocean.
概略ReportBy Rohit Gupta, Jon Lebkowsky, 和Dina MehtaAt
大約7AM 上星期天破裂發生了沿著緬甸和印度板材聚合, 造成巨大9.0 地震, 1899 年第五大因為科學家起動的記錄和跟蹤巨大地震的一條海裡的短層線。這是第二次大地震在區域在一個星期, 第一是之內巨大8.1 地震在澳洲和南極州之間在12月23 日。第一地震沒有導致一tsumami 因為它構造板材水平地滑倒。但是第二次大事件在東南亞附近是一種垂直的推力, 或"推力缺點," 地震, 偏移重大相當數量海洋水, 觸發海嘯東部和西部從短層線。引人注目從表面海嘯 的力量是海裡的, 和是因此不是直到波浪接近了陸地. 初見陸地波浪, 會是移動的上百英里每小時, 減慢和增長一樣大像二個故事高, 根據證人。用波浪的災難力量碰撞沒有警告, 喪生和物產是重大. 喪生是主要可防止的有海嘯檢測系統是到位。但是, 那不是實際情形, 因為海嘯是罕見的在印度洋。