Archive "Seismological Bulletin" Symbol Format
Introduction
------------
Archive "Seismological Bulletin" consists from the event set:
Event_1 Event_2 ... Event_N
There are 5 record types, which all represent one event:
Record_type Record_identification Relative_name
(internal code) (for manual pages only) (for manual pages only)
--------------- ------------------------- -----------------------
1 Epicenter line Head
2 Magnitude line Magn
8 Comments Comm
10 Primary phase line StaP
11 Secondary phase & maximum StaS
Each record is 80 bytes long.
All records are assumed to be event entries such as:
10 19 Ns
Head [Magn] {Comm} {StaP {StaS} }
0 0
where Ns is the number of stations reported data for an event.
Epicenter line
--------------
Bytes Contents Format Description
----- ------------------------- -------- --------------------------
1-2 This record type i2 must be = 1
3-4 Next record type i2 2, 8 or 10
5-12 Event date i4,2i2 YYYYMMDD, YYYY - year,
MM - month, DD - day
13-19 Origin time 2i2,f3.1 hhmmsss, hh - hours, mm -
minutes, ss.s - seconds
20-22 Standart deviation f3.2 Rms of defining phase
residuals
23-27 Latitude f5.3 in degrees
28 Latitude symbol a1 N or S
29-34 Longitude f6.3 in degrees
35 Longitude symbol a1 E or W
36-38 Small axis of ellip.error f3.1 in kilometers
39-41 Large axis of ellip.error f3.1 in kilometers
42-45 Large axis azimuth f4.1 in degrees
46-48 Focal depth i3 in kilometers
49-57 Reserved a9 blanks
58-60 Number of P/PKP epicenter
defining observations i3
61-63 Total number of P/PKP
observations i3
64-66 Number of P/PKP focal
depth defining observations i3
67-70 Seismic region number i4
71-73 Geographical region number i3
74-77 Event number since the
beginning of the year i4
78 Station data printing flag i1 0 or 1: 0 = yes, 1 = no *)
79-80 Number of magnitude types
defined for this event i2 0, 1, 2 or 3
----------------------------------------------------------------------
*) Printed bulletin version contains station data for events that have
magnitude more than some predefined values.
Magnitude line
--------------
Bytes Contents Format Description
----- ------------------------- -------- --------------------------
1-2 This record type i2 must be = 2
3-4 Next record type i2 8 or 10
5-12 Event date i4,2i2 YYYYMMDD, YYYY - year,
MM - month, DD - day
13-14 Number of magnitude types i2 1, 2 or 3
15-16 Magnitude value f2.1
17-20 Magnitude type a4 "MPSP", "MPLP" or "MS"
21-22 Reserved a2 blanks
23-26 Channel a4 "SP","SPZ","SPN","SPE",
"MP","MPZ","MPN","MPE",
"LP","LPZ","LPN","LPE"
27-29 Number of observations
for this magnitude type i3
30-44 The same as 15-29 bytes if number of magnitude
for second magnitude type types > 1
45-59 The same as 15-29 bytes if number of magnitude
for third magnitude type types = 3
60-80 Reserved a21 blanks
----------------------------------------------------------------------
Comments
--------
Bytes Contents Format Description
----- ------------------------- -------- --------------------------
1-2 This record type i2 must be = 8
3-4 Next record type i2 8 or 10
5-12 Event date i4,2i2 YYYYMMDD, YYYY - year,
MM - month, DD - day
13-70 Comment text a58
71-80 Reserved a10 blanks
______________________________________________________________________
Primary phase line
------------------
Bytes Contents Format Description
----- ------------------------- -------- --------------------------
1-2 This record type i2 must be = 10
3-4 Next record type i2 11, 10 or 1
5-12 Event date i4,2i2 YYYYMMDD, YYYY - year,
MM - month, DD - day
13-18 Station code a6
19-33 Station name a15
34-38 Epicentral distance f5.2 in degrees
39-41 Epicenter-station azimuth i3 in degrees
42-47 Computed P-phase
identification a6
48-50 First motion SP indicators 3a1 {C|D| }{N|S| }{E|W| }
51-53 First motion LP indicators 3a1 {C|D| }{N|S| }{E|W| }
54 Primary phase clarity a1 {I|E|Q| } where
I indicating an accuracy
to within +/- 0.2 seconds
E - within +/-1.0 seconds
Q - less accurate than
+/- 1 second
55-59 Reserved a5 blanks
60-66 First arrival time 2i2,f3.1 hhmmsss, hh - hours, mm -
minutes, ss.s - seconds
67-70 tobs - tJB residual f4.1
71-73 Channel a3 "SP","SPZ","SPN","SPE",
"MP","MPZ","MPN","MPE",
"LP","LPZ","LPN","LPE"
74 Defining P/PKP observation
flag a1 " " = yes, "*" = no
75-80 Reserved a6 blanks
----------------------------------------------------------------------
Secondary phase & maximum
-------------------------
Bytes Contents Format Description
----- ------------------------- -------- --------------------------
1-2 This record type i2 must be = 11
3-4 Next record type i2 11,10 or 1
5-12 Event date i4,2i2 YYYYMMDD, YYYY - year,
MM - month, DD - day
13-14 Internal secondary phase
code i2 look at "Phase list" below
15-19 Secondary phase arrival
time i2,f3.1 mmsss, mm - minutes,
ss.s - seconds
20 Secondary phase clarity a1 {I|E| } where
I - impulse arrival
E - emergent arrival
21-23 Channel a3 "SP","SPZ","SPN","SPE",
"MP","MPZ","MPN","MPE",
"LP","LPZ","LPN","LPE"
24-29 Station operator's phase
identification a6
30-33 Computed identification
secondary phase error f4.1 999.9 means "didn't computed"
34-37 Station operator's
identification secondary
phase error f4.1 999.9 means "didn't computed"
38-39 Internal phase maximum code i2 97 ="LM", 98 ="PM", 99 ="SM"
40-44 Time of maximum amplitude i2,f3.1 mmsss, mm - minutes,
ss.s - seconds
45-47 Channel a3 "SP","SPZ","SPN","SPE",
"MP","MPZ","MPN","MPE",
"LP","LPZ","LPN","LPE"
48-50 Maximum amplitude period f3.1 in seconds
51-57 Maximum amplitude on N-S f7.3 in micrometers
58-64 Maximum amplitude on E-W f7.3 in micrometers
65-71 Maximum amplitude on Z f7.3 in micrometers
72-73 Station magnitude value on
horizontal components f2.1
74-75 Station magnitude value on
vertical component f2.1
76-80 Reserved a5 blanks
----------------------------------------------------------------------
Phase list
----------
Internal phase code Phase name | Internal phase code Phase name
------------------- ---------- | ------------------- ----------
2 P | 26 Sg C
3 pP | 27 Pn B
4 sP | 28 Pg B
5 S | 29 Sn B
6 sS | 30 Sg B
7 PKiKP | 31 PP
8 pPKiKP | 32 PPP
9 sPKiKP | 33 PS
10 PKP2 | 34 SP
11 PKHKP | 35 SS
13 Pn A | 36 SSS
14 P* A | 37 PPS
15 Pg A | 38 PSP
16 Sn A | 39 SPP
17 S* A | 40 SSP
18 Sg A | 41 PSS
19 Pn F | 42 SPS
20 Sn F | 43 PcP
21 Pn C | 44 ScS
22 P* C | 45 SKS 1
23 Pg C | 46 SKS 2
24 Sn C | 47 SKKS
25 S* C | 48 SKKKS
------------------------------------------------------------------
For local phases: A - Middle Asia, F - Far East, C - Caucasus,
B - Baikal
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