Nordic Format¶
Type 1 Line - Main Header¶
This header contains most important information of the event such as time and location.
Columns | Format | Description | Comments |
1 | Free | ||
2-5 | I4 | Year | Origin time (GTM) |
6 | Free | ||
7-8 | I2 | Month | |
9-10 | I2 | Day of the month | |
11 | Free | ||
12-13 | I2 | Hour | |
14-15 | I2 | Minutes | |
16 | Free | ||
17-20 | F4.1 | Seconds | |
21 | A1 | Location model or quality indicator | Any character |
22 | A1 | Distance indicator | L = Local, R = Regional, D = Distant |
23 | A1 | Event ID |
|
24-30 | F7.3 | Epicenter latitude (+N) | |
31-38 | F8.3 | Epicenter longitude (+E) | |
39-43 | F5.1 | Depth (km) | |
44 | A1 | Depth control or quality | F = Fixed depth, S = Starting value, D,G,N,*,? as used by USG |
45 | A1 | Locating Indicator | F = Fixed depth, S = Starting value |
46-48 | A3 | Epicenter reporting agency |
|
49-51 | I3 | Number of stations used | |
52-55 | F4.1 | RMS of time residuals (s) | |
56 | Free | ||
57-59 | F3.1 | Magnitude no. 1 | |
60 | A1 | Type of Magnitude |
|
61-63 | A3 | Magnitude reporting agency | |
64 | Free | ||
65-67 | F3.1 | Magnitude no. 2 | |
68 | A1 | Type of Magnitude | |
69-71 | A3 | Magnitude reporting agency | |
72 | Free | ||
73-75 | F3.1 | Magnitude no. 3 | |
76 | A1 | Type of Magnitude | |
77-79 | A3 | Magnitude reporting agency | |
80 | A1 | Type of this line (“1”) |
Type 2 Line - Macroseismic Header¶
This line contains the macroseismic information of the event. The header is optional and only required with macroseismic events.
Columns | Format | Description | Comments |
1-5 | Free | ||
6-20 | A15 | Any descriptive text | |
21 | Free | ||
22 | A1 | Diastromorphism code (PDE type) |
|
23 | A1 | Tsunami code (PDE type) |
|
24 | A1 | Seiche code (PDE type) |
|
25 | A1 | Cultural effects (PDE type) |
|
26 | A1 | Unusual effetcs (PDE type) |
|
27 | Free | ||
28-29 | I2 | Maximum observed intensity | |
30 | A1 | Maximum intensity qualifier | (+/-) indicating more precisely the intensity |
31-32 | A2 | Intensity Scale(ISC scale) |
|
33 | Free | ||
34-39 | F6.2 | Macroseismic latitude | |
40 | Free | ||
41-47 | F7.2 | Macroseismic longitude | |
48 | Free | ||
49-51 | F3.1 | Macroseismic magnitude | |
52 | A1 | Type of Magnitude |
|
53-56 | F4.2 | Logarithm (base 10) of radius(km) of felt area | |
57-61 | F5.2 | Logarithm (base 10) of area(km**2) number 1 where earthquake was felt exceeding a given intensity | |
62-63 | I2 | Intensity bordering the area number 1 | |
64-68 | F5.2 | Logarithm (base 10) of area(km**2) number 2 where earthquake was felt exceeding a given intensity | |
69-70 | I2 | Intensity bordering the area number 2 | |
71 | Free | ||
72 | A1 | Quality rank of the report | (A, B, C, D) |
73-75 | A3 | Reporting agency | |
76-79 | Free | ||
80 | A1 | Type of this line(“2”) |
Type 3 Line - Comment Header¶
This header contains a comment on the event and it is optional in many cases.
Columns | Format | Description | Comments |
1 | Free | ||
2-79 | A15 | Text | |
80 | A1 | Type of this line(“3”) |
Type 5 line - Error Header¶
This header contains error estimates of the previous line in the same format as the preceding this header. The header is optional.
Columns | Format | Description | Comments |
1 | Free | ||
2-79 | Error estimates in same format as previous line, normally type 1 line | ||
80 | A1 | Type of this line(“5”) |
Type 6 line - Waveform Header¶
This header contains the format and name of the waveform file associated with this event. The header is optional.
Columns | Format | Description | Comments |
1 | Free | ||
2-79 | A | Dataformat and name of the waveform file associated with this event | |
80 | A1 | Type of this line(“5”) |
Type 7 line - Help Header¶
This line describes the phase data format for greater readability. This line is optional and always the same:
" STAT SP IPHASW D HRMM SECON CODA AMPLIT PERI AZIMU VELO SNR AR TRES W DIS CAZ7"
Type ‘ ‘ line - Phase Arrival Data¶
This line contains information about a single observation from a station. There are usually a lot of these lines and they make up the observation that can be read from the main header.
Columns | Format | Description | Comments |
1 | Free | ||
2-5 | A4 | Station code | Blank = end of readings |
6 | Free | ||
7 | A1 | Instrument type | S = SP, B = BB, L = LP |
8 | A1 | Component | Z, N, E |
9 | Free | ||
10 | A1 | Quality indicator | I, E, etc. |
11-14 | A4 | Phase type (PG,SG,PN,etc.) |
|
15 | I1 | Weighting indicator(1-4) | 0 = full weight as in Hypocenter program 9 = timing error for the station |
16 | Free | ||
17 | A1 | First motion | C/D = clear compression/dilatation +/- = unclear compression/dilatation |
18 | A1 | Time info | Blank = same day as in type 1 line + = next day, - = previous day |
19-20 | I2 | Hour | Phase onset time or time of maximum amplitude measurement (GTM) |
21-22 | I2 | Minutes | |
23 | Free | ||
24-28 | F5.2 | Seconds | |
29 | Free | ||
30-33 | I4 | Signal duration (s) | From phase onset to noise |
34 | Free | ||
35-40 | F6.1 | Maximum amplitude (nm) | Zero to peak ground motion amplitude |
41 | Free | ||
42-45 | F4.2 | Period of maximum amplitude (s) | |
46 | Free | ||
47-51 | F5.1 | Back azimuth (deg) | |
52 | Free | ||
53-56 | F4.1 | Apparent velocity (km/s) | |
57-60 | F4.1 | Signal-to-noise ratio | |
61-63 | I3 | Azimuth residual (deg) | Observed minus theoretical |
64-68 | F5.1 | Travel time residual (s) | Observed minus theoretical |
69-70 | I2 | Actual weight user for location | |
71-75 | I5 | Epicentral distance (km) | |
76 | Free | ||
77-79 | I3 | Epicenter-to-station azimuth (deg) | |
80 | A1 | Type of this line (” “) |
Example Nordic File¶
Here is a example for a nordic file:
2013 0103 0613 04.3 LE 63.635 22.913 0.0F HEL 15 0.3 1.6LHEL 1.4LUPP 1
GAP= 80 0.1 0.391 0.477 0.0 5
FULLY AUTOMATIC, EVENT TYPE & LOCATION & MAGNITUDE CHECKED (NIH) 3
CSS:2013003061203.WFDISC (DET3C) 6
MINING AREA & TIME WINDOW: PEDERSORE 3KM 3
2013 0103 0613 4.0 LE 63.650 22.942 0.0FFHEL 11 0.4 1.6LHEL 1
2013 0103 0613 5.2 LP 63.680 22.728 0.1F UPP 7 0.3 1.4LUPP 1
FINLAND 3
STAT SP IPHASW D HRMM SECON CODA AMPLIT PERI AZIMU VELO SNR AR TRES W DIS CAZ7
VAF BZ EP 0613 15.30 7.0 0.210 67 191
VAF BZ ES 0613 23.10 0.4 4
UMAU BZ EP 0613 22.64 -0.010 114 285
BURU BZ EPB 0613 25.38 141.0 -0.1 9 130 325
BURU BZ ES 0613 39.82 -0.3 4
ODEU BZ EP 0613 26.31 -0.2 9 138 310
SVAU BZ EP 0613 34.71 0.3 8 189 302
KEF BZ EPN 0613 35.36 0.0 4 192 148
KEF BZ ESN 0613 58.10 -0.0 8
SUF BZ EPG 0613 35.20 -0.1 8 193 121
SUF BZ MSG 0613 55.58 3.6 0.20
SUF BZ ESN 0613 58.00 -0.3 9
OUL BZ EPG 0613 39.06 224.0 -0.2 4 217 40
OUL BZ ESG 0614 04.50 0.3 5
SJUU BZ EP 0613 38.75 0.1 8 218 344
LILU BZ EP 0613 41.40 0.5 8 236 323
KAF BZ EPB 0613 42.50 314.0 0.2 4 243 133
KAF BZ MSG 0614 8.53 2.7 0.20
KAF BZ ESG 0614 11.10 -0.2 0
KALU BZ EPB 0613 43.50 0.2 6 249 5
KALU BZ ESB 0614 12.34 0.4 4
HEMU BZ EPB 0613 45.78 61.0 -0.4 8 268 249
HEMU BZ ESG 0614 18.14 -0.3 4
TOF BZ EPB 0613 48.10 0.0 3 281 13
TOF BZ MSG 0614 18.11 2.2 0.20
TOF BZ ESB 0614 20.10 -0.1 0
ERTU BZ ES 0614 27.84 0.4 0 328 354