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The JMA announced the Earthquake Early Warning hit (accuracy) rate for the 2011 fiscal year on 31 May 2012. The hit rate is the percentage of warnings issued immediately on the detection of P-waves with a Japan Meteorological Agency seismic intensity scale (震度, shindo) number (0 to 7) within one shindo number of the measured earthquake.
Alert messages sent on 29 August 2017 North Korean missile launch over Japan. Earthquake. Earthquake Early Warning; Quick updates on hypocenter, magnitude, and precautions of possible tsunami; Information of hypocenter, magnitude, intensities of various areas, and the presence of tsunami; Earthquake prediction warning for the Tōkai earthquakes
Japan issued a “megaquake advisory” following a 7.1-magnitude earthquake off its coast. That raised the risk of a larger quake on the Nankai Trough, an underwater subduction zone.
Japan's Earthquake Early Warning system was put to practical use in 2006. The system that warns the general public was installed on October 1, 2007. [25] [26] It was modeled partly on the Urgent Earthquake Detection and Alarm System (UrEDAS ) of Japan Railways, which was designed to enable automatic braking of bullet trains. [27]
Earthquakes make soil unstable and prone to further landslides, especially after heavy rains. The weather agency downgraded its warning level Sunday, but asked residents to remain on high alert.
Japan earthquake: Passengers run for cover as train station shakes and water pours through ceiling. 09:15, Maroosha Muzaffar. Seismology experts caught off guard over intensity of 1 January earthquake
A powerful earthquake measuring magnitude 7.1 struck southwestern Japan on Thursday, triggering tsunami warnings for a number of the country’s western islands and causing mostly minor injuries ...
Following the earthquake, the Japan Meteorological Agency (JMA) issued a 'Nankai Trough Earthquake Extra Information' advisory [23] that the probability of a megathrust earthquake along the Nankai Trough increased from a 0.1% per week to 1% chance [24] in what was the first advisory of its kind but clarified that it was not imminent.