| Col. | Type | Item | Description |
|---|---|---|---|
| 01 – 06 | A6 | Seismic station code | Six-character JMA code for the seismic station |
| 07 – 14 | A8 | Blank | Blank |
| 15 – 17 | I3 | Longitude (degrees) | Longitude of seismic station (degrees) |
| 18 – 21 | F4.2 | Longitude (minutes) | Longitude of seismic station (minutes) |
| 22 – 23 | I2 | Latitude (degrees) | Latitude of seismic station (degrees) |
| 24 – 27 | F4.2 | Latitude (minutes) | Latitude of seismic station (minutes) |
| 28 – 31 | I4 | Seismic station number | Number of the seismic station |