| Col. | Type | Item | Description |
|---|---|---|---|
| 01 | A1 | Record type identifier | Data record type identifier T: Centroid record |
| 02 – 05 | I4 | Year | Year of centroid time (Japan Standard Time = UTC + 9 h; the same applies below.) |
| 06 – 07 | I2 | Month | Month of centroid time |
| 08 – 09 | I2 | Day | Day of centroid time |
| 10 – 11 | I2 | Hour | Hour of centroid time |
| 12 – 13 | I2 | Minute | Minute of centroid time |
| 14 – 17 | F4.2 | Second | Second of centroid time |
| 18 – 21 | A4 | Blank | Blank |
| 22 – 24 | I3 | Latitude (degrees) | Latitude of centroid (degrees) |
| 25 – 28 | F4.2 | Latitude (minutes) | Latitude of centroid (minutes) |
| 29 – 32 | A4 | Blank | Blank |
| 33 – 36 | I4 | Longitude (degrees) | Longitude of centroid (degrees) |
| 37 – 40 | F4.2 | Longitude (minutes) | Longitude of centroid (minutes) |
| 41 – 44 | A4 | Blank | Blank |
| 45 – 49 | F5.2 | Depth (kilometers) | Depth of centroid (kilometers) |
| 50 – 52 | A3 | Blank | Blank |
| 53 – 54 | F2.1 | Magnitude | Moment magnitudes |
| 55 | A1 | Magnitude type | Magnitude type W: Moment magnitude based on JMA's centroid moment tensor solution |
| 56 – 96 | A41 | Blank | Blank |