Agency Adds Alerts for Long-Period Earthquake Motion
![](https://japannews.yomiuri.co.jp/wp-content/uploads/2023/01/kisyou-cho2.jpg)
The signboard of the Japan Meteorological Agency in Tokyo
12:36 JST, February 1, 2023
The Japan Meteorological Agency added long-period earthquake motion, which strongly shake high-rise buildings during earthquakes, to the scope of its earthquake early warning system starting from noon on Wednesday.
Up to now, the warning system was triggered in areas where a conventional quake is expected to register 4 or higher on the Japanese seismic intensity scale of 7.
The warning will now also be issued to areas where such damage from long-period seismic tremors are predicted.
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