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Japan’s much vaunted J-Alert warning system running up against its limitations

In addition to technical difficulties that can result in false alarms, many feel the warnings do not come soon enough

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Residents, office and shop workers during a disaster drill in Tokyo. Photo: AFP
Agence France-Presse

On January 5, as Tokyo’s commuters were struggling back to work after their long New Year break, blaring sirens from every phone pierced the sleepy atmosphere: “strong” earthquake coming.

The message delivered via the country’s alert system, part of its much-hyped J-Alert mechanism, warned of a big one directly hitting the Japanese capital – potentially on the scale of the devastating 2011 earthquake that wrought massive destruction. Millions braced for impact … but it never came.

It turned out that the system, which aims to give a precious few seconds to find shelter before a major earthquake strikes, had been tricked by an unusual seismological coincidence.

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Two minor tremors struck at almost exactly the same time in separate locations, making the alert system mistakenly believe a massive jolt was on its way, the meteorological agency admitted.

Even Prime Minister Shinzo Abe was caught off guard – with TV footage showing him checking his phone as alarms echoed in his office ahead of a cabinet meeting.

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It was not the first false alarm for the system, a major component of Japan’s J-Alert launched with great fanfare in 2007 as a way to save lives in a country constantly under threat of earthquakes and – more recently – North Korean missiles.

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