| Col. | Type | Item | Description |
|---|---|---|---|
| 01 | A1 | Record type identifier | Data record type identifier M: Nodal plane solution record |
| 02 | A1 | Solution determination method | Solution determination method I: Determined from initial motion P-wave polarities |
| 03 | A1 | Blank | Blank |
| 04 – 07 | A4 | Source | Target catalogue for solution determination JMAM: The Seismological Bulletin of Japan Meteorological Agency |
| 08 – 12 | A5 | Blank | Blank |
| 13 | A1 | Fault plane | Fault plane 1: Nodal plane A 2: Nodal plane B Blank: Undetermined |
| 14 – 15 | I2 | Date | Date of origin time |
| 16 | A1 | Fault plane type (A) | Fault plane type R: Reverse fault N: Normal fault |
| 17 | A1 | Blank | Blank |
| 18 – 19 | A2 | Fault plane type (B) | Fault plane type SS: Strike-slip DS: Dip-slip AM: Undetermined |
| 20 – 23 | I4 | Azimuth | Azimuth of P-axis (0 – 360 degrees, measured clockwise from north) |
| 24 – 26 | I3 | Dip | Dip of P-axis (0 – 90 degrees, measured downward from horizontal plane) |
| 27 – 30 | I4 | Azimuth | Azimuth of T-axis (0 – 360 degrees, measured clockwise from north) |
| 31 – 33 | I3 | Dip | Dip of T-axis (0 – 90 degrees, measured downward from horizontal plane) |
| 34 – 37 | I4 | Azimuth | Azimuth of N-axis (0 – 360 degrees, measured clockwise from north) |
| 38 – 40 | I3 | Dip | Dip of N-axis (0 – 90 degrees, measured downward from horizontal plane) |
| 41 – 44 | I4 | Strike | Strike of A plane (0 – 360 degrees, measured clockwise from north) |
| 45 – 47 | I3 | Dip | Dip of A plane (0 – 90 degrees, measured downward from horizontal plane) |
| 48 – 52 | I5 | Slip angle | Slip angle of A plane (−180 – 180 degrees (minus sign indicates a normal fault)) |
| 53 – 56 | I4 | Strike | Strike of B plane (0 – 360 degrees, measured clockwise from north) |
| 57 – 59 | I3 | Dip | Dip of B plane (0 – 90 degrees, measured downward from horizontal plane) |
| 60 – 64 | I5 | Slip angle | Slip angle of B plane (−180 – 180 degrees (minus sign indicates a normal fault)) |
| 65 – 67 | I3 | Score | Score |
| 68 – 71 | I4 | Number of stations | Number of stations contributing to nodal plane solution analysis |
| 72 – 79 | A8 | Blank | Blank |
| 80 | A1 | Take-off angle table type | Type of Take-off angle table Blank: Corresponding to the table reported by Ichikawa and Mochizuki (1971), Hamada (1984), and others 1: Corresponding to the table reported by Ueno et al. (2002) (JMA2001) 2: Corresponding to JMA2001A for inland stations, JMA2020A for those within landward slopes, JMA2020B for those in outer-rise regions of the Japan Trench, and JMA2020C for those within the Nankai Trough area |
| 81 – 87 | A7 | Blank | Blank |
| 88 – 89 | I2 | Year | Last two digits of year |
| 90 – 91 | I2 | Month | Month |
| 92 – 94 | A3 | Projection | Projection UP: Equal area projection, upper hemisphere LOW: Equal area projection, lower hemisphere |
| 95 – 96 | A2 | Blank | Blank |