QUANTA

Sunday, April 10, 2011


Japanese Early Earthquake Warning System Saved Lives

In the minutes preceding the largest earthquake in the history of Japan, millions of people got a glimpse of the future. Television broadcasts were briefly interrupted by the crisp, telephonic ringing. A bright blue box appeared on the screen showing the eastern coast of Japan and a large red X off shore depicting the epicenter for the massive jolt of seismic activity.

The tragedy in Japan following the March 11 earthquake and tsunami would have been far worse if not for the early earthquake warning system, which issued an alert to television stations, radios, trains, and even cell phones in the seconds before the 9.0 quake hit. The system was originally put in place in 2007 and is maintained by Japan’s Meteorological Agency. It uses a network of approximately 100 seismographic sensors to detect the P waves (low level initial tremors) released by seismic activity. The P waves telegraph the size of the secondary S waves, which are much larger and cause far more damage.

“The alert is issued automatically,” Satoshi Harada of Japan’s Meteorological Agency told FUTURIST UPDATE. “Once the seismometer detects the signal, they transfer to headquarters. [The alert] is processed and issued to the public.”

The system also shuts down high-speed rail service along Shinkansen (bullet trains), which can travel in excess of 300 miles per hour. There are—to date—no reports of Shinkansen derailments resulting from the earthquake.


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Publisher and/or Author and/or Managing Editor:__Andres Agostini ─ @Futuretronium at Twitter! Futuretronium Book at http://3.ly/rECc