美國加州6級地震 系統提前10秒預警

Scientists at UC Berkeley released a video showing an earthquake early-warning system that sent an alert before the magnitude-6.0 Napa earthquake Sunday morning.
加州伯克利大學科學家發佈的一則視頻顯示加州酒鄉Napa週日上午發生6.0級地震前，地震預警系統提前發出了警報。

Officials said the system provided an alert 10 seconds before the quake was felt.
官方表示，系統在人們感覺到震動前10秒發出了預警。

California is working to complete a statewide system, which could be unveiled in the next few years.
覆蓋全州的加州預警系統目前正在建設當中，預計幾年後才能完工。

Once fully developed, the system could give downtown Los Angeles 40 to 50 seconds of warning that the “Big One” was headed from the San Andreas fault, giving time for elevators to stop at the next floor and open up, firefighters to open up garage doors, high-speed trains to slow down to avoid derailment and surgeons to take the scalpel out of a patient.
系統全部建設完成後，一旦聖安地列斯斷層帶發生大地震，洛杉磯將能提前40到50秒收到預警，這意味着電梯將有時間在下個樓層停靠並把門打開，消防員能有時間打開車庫門，高速列車有時間降速以防出軌，外科醫生能有時間暫停手術。

A lack of funds, however, has slowed the system's progress.
然而由於資金不足，該系統的建設進度較爲緩慢。

The system works because while earthquakes travel at the speed of sound, sensors that initially detect the shaking near the epicenter of a quake can send a message faster -- at the speed of light -- to warn residents farther away that the quake is coming.
系統的工作原理在於地震波的傳播速度與聲波相近，傳感器在震中附近探測到震動後以光速搶先向遠處的居民傳遞地震預警信號。

Rep. Adam Schiff (D-Burbank) said the successful test shows the need for the system.
衆議員謝安達表示，這次測試的成功顯示了建立系統的必要性。

While this was not the 'big one,' we need to be prepared to save lives and protect vital infrastructure -- even a few seconds of warning will allow people to seek cover, automatically slow or stop trains, pause surgeries and more," he said in a statement.
他在聲明中說道，“雖然這次地震沒有達到8級以上，但我們仍需做好救援準備，保護重要基礎設施。即使只提前幾秒預警，人們也能有更多時間尋找掩蔽物，讓列車降速或停車，暫停手術和採取其他措施。”