Japan Meteorological Agency to study "non-incoming" system operation method with a total of 60 seismic intensity meters

In this earthquake, the data of 60 seismic intensity meters in total was "not received" which means "it is considered that the seismic intensity is 5 lower or higher, but the seismic intensity has not been obtained".

In most cases, the seismic intensity was 1 or 2, but with the current system of the Japan Meteorological Agency, it was found that if the difference with the nearby seismic intensity was large, it would be displayed as "not received", and the Japan Meteorological Agency is considering how to operate it. ..

In addition to Oita and Miyazaki prefectures that observed shaking with a seismic intensity of 5 or higher in this earthquake, data from a total of 60 seismic intensity meters in seven prefectures, including Kochi, Kumamoto, Yamaguchi, Ehime, and Fukuoka prefectures, is " "Not received" is displayed.

According to the Japan Meteorological Agency, one of the seismic intensity meters in Saiki City, Oita Prefecture, which observed shaking with a seismic intensity of 5 or higher, had a seismic intensity due to strong shaking because the connection with the battery failed before the earthquake and was connected to another power source. It means that the information may not have been entered.

It is estimated that the shaking had a seismic intensity of 5 or higher.

On the other hand, it is said that 42 seismic intensity meters in total normally observed shaking with seismic intensity 1 to 2, but with the current setting of the Japan Meteorological Agency, if shaking with a seismic intensity of 5 lower or higher is observed in the vicinity, it will be the observed value. Because the difference between the two is large, it is treated as "not received" because there is a possibility of incorrect data.

In addition to this, there was one seismic intensity meter that was under maintenance, and some of the seismic intensity meters installed by local governments in Oita, Miyazaki, and Kumamoto prefectures did not send data.

The Japan Meteorological Agency will investigate the status of data that has not been received, and will also consider how to operate the system, which is regarded as "not received" even though the seismic intensity is observed.