| Col. | Type | Item | Description |
|---|---|---|---|
| 01 | A1 | Record type identifier | Data record type identifier W: Data record detected by Matched filter method |
| 02 – 07 | A6 | Seismic station code | Six-character JMA code for the seismic station |
| 08 – 11 | I4 | Seismic station number | Number of the seismic station |
| 12 | A1 | Blank | Blank |
| 13 | A1 | Seismometer type | Type of seismometer Blank if the type is unknown. The following letters denote types: A: 87-type electromagnetic strong-motion seismograph (acceleration) B: 87-type electromagnetic strong-motion seismograph (velocity) C: 87-type electromagnetic strong-motion seismograph (displacement) D: 59-type (displacement, including 63-type) E: 61-type (displacement), STS F: Other JMA seismometer (acceleration) G: Other JMA seismometer (velocity) H: Other JMA seismometer (displacement) J: Velocity type, local, buried sensor, with logarithmic amplifier K: Velocity type, local, buried sensor L: Velocity type, local, surface installation M: Velocity type, remote, buried sensor N: Velocity type, remote, surface installation P: JMA OBS (acceleration) Q: JMA OBS (velocity) R: JMA OBS (displacement) S: JMA mechanical strong-motion seismograph T: 67-type velocity sensor with logarithmic amplifier (remote) U: Other JMA seismometer (component unknown) V: JMA installation in volcanic region (acceleration) W: JMA installation in volcanic region (velocity) Y: JMA installation in volcanic region (displacement) Z: JMA strain, etc. a: Displacement (two instances of numerical integration using acceleration seismograph, HPF 1 s) b: Displacement (two instances of numerical integration using acceleration seismograph, HPF 3 s) c: Displacement (two instances of numerical integration using acceleration seismograph, HPF 5 s) d: Displacement (two instances of numerical integration using acceleration seismograph, HPF 10 s) e: Displacement (two instances of numerical integration using acceleration seismograph, HPF 20 s) f: Displacement (two instances of numerical integration using acceleration seismograph, HPF 6 s reproducing mechanical strong-motion seismograph characteristics [S]) j: Displacement (two instances of numerical integration using seismic intensity-meter, HPF 6 s reproducing mechanical strong-motion seismograph characteristics [S]) g: Velocity (numerical integration using acceleration seismograph, HPF 3 s) n: Velocity (numerical integration using acceleration seismograph, HPF 1 s) k: S-net (*), below the sea bed (velocity) l: S-net (*), on the sea bed (velocity) r: Other organization, other OBS (velocity) &: Other organization (acceleration) %: Other organization, surface installation (velocity) s: Other organization, bore-hole installation (velocity) t: Other organization, horizontal-tunnel installation (velocity) #: Other organization (displacement) h: High-sensitivity seismometer with bore-hole installation (velocity) ?: Other organization (component unknown) w: Other organization (broad-band velocity) o: JMA installation in volcanic region, bore-hole installation (velocity) p: JMA installation in volcanic region (broad-band) u: Installation in volcanic region (air vibration) x: Overseas (velocity) |
| 14 – 15 | I2 | Head time (days) | Head time of time window (days) |
| 16 – 19 | A4 | Phase name | Phase name is "X" |
| 20 – 21 | I2 | Head time (hours) | Head time of time window (hours) |
| 22 – 23 | I2 | Head time (minutes) | Head time of time window (minutes) |
| 24 – 27 | F4.2 | Head time (seconds) | Head time of time window (seconds) |
| 28 – 31 | F4.1 | Length (seconds) | Length of the time window (seconds) |
| 32 – 34 | I3 | Correration coefficient (N-S component) | Hundredfold Correlation coefficient in the N-S component |
| 35 – 37 | I3 | Correration coefficient (E-W component) | Hundredfold Correlation coefficient in the E-W component |
| 38 – 40 | I3 | Correration coefficient (U-D component) | Hundredfold Correlation coefficient in the U-D component |
| 41 – 43 | A3 | Blank | Blank |
| 44 – 48 | I5 | Maximum amplitude (ground displacement) | Maximum amplitude of the N-S component If the record saturates, "-1" is written in this space. |
| 49 – 51 | F3.1 | Period of maximum amplitude | Period of the N-S component corresponding to maximum amplitude (in seconds) |
| 52 – 56 | I5 | Maximum amplitude (ground displacement) | Maximum amplitude of the E-W component |
| 57 – 59 | F3.1 | Period of maximum amplitude | Period of the E-W component corresponding to maximum amplitude (in seconds) |
| 60 – 64 | I5 | Maximum amplitude (ground displacement) | Maximum amplitude of the U-D component |
| 65 – 67 | F3.1 | Period of maximum amplitude | Period of the U-D component corresponding to maximum amplitude (in seconds) |
| 68 – 70 | A3 | Blank | Blank |
| 71 | A1 | Unit of maximum amplitude | J or K: 10−9 m/s; 0.1 microkines 1 or A: 10−8 m/s; microkines 2 or B: 10−6 m; micrometers 3 or C: 10−5 m/s2; mgals 4 or D: 10−7 m/s; 10 microkines 5 or E: 10−5 m; 10 micrometers 6 or F: 10−4 m/s2; 10 mgals 7 or G: 10−6 m/s; 100 microkines 8 or H: 10−4 m; 100 micrometers 9 or I: 10−3 m/s2; 100 mgals J and 1 – 9 are used for magnitude calculations, K and A – I are not used for magnitude calculations. |
| 72 – 75 | I4 | Theoretical arrival time (year) | Theoretical arrival time of the phase estimated from the template event (year) |
| 76 – 77 | I2 | Theoretical arrival time (month) | Theoretical arrival time of the phase estimated from the template event (month) |
| 78 – 79 | I2 | Theoretical arrival time (day) | Theoretical arrival time of the phase estimated from the template event (day) |
| 80 – 81 | I2 | Theoretical arrival time (hours) | Theoretical arrival time of the phase estimated from the template event (hours) |
| 82 – 83 | I2 | Theoretical arrival time (minutes) | Theoretical arrival time of the phase estimated from the template event (minutes) |
| 84 – 87 | F4.2 | Theoretical arrival time (seconds) | Theoretical arrival time of the phase estimated from the template event (seconds) |
| 88 – 89 | I2 | Year | Last two digits of year |
| 90 – 91 | I2 | Month | |
| 92 | A1 | Data information flag | Type of filter %: BPF 2 - 8 Hz |
| 93 | A1 | Phase name | Phase name of the template |
| 94 – 96 | A3 | Blank | Blank |
(*) S-net: Seafloor observation network for earthquakes and tsunamis along the Japan Trench