GEOPHYSICS OF NORTH AMERICA
         ARCHIVE SEISMICITY DATA

This directory contains the entire DNAG seismicity
archive files. The archive files are ASCII. The
file is sorted chronologically.

ARCHIVE FILES: 
The archive files exist in two forms. There are
regionalized archive files called EQARC.NUM, and
the complete archive file called SEISMIC. These
files are in the original format described by
Engdahl and Rinehart in the DNAG volume. There are
112 characters / record. 

The first 10 and last 10 records of the complete
file look like this:

count    1         2         3         4         5
         6         7         8         9         0
         1
12345678901234567890123456789012345678901234567890
12345678901234567890123456789012345678901234567890
1234567890

NEUS 1534 0 0 0 0 0.00CH 47.700 -70.100  0.0447  0
0.00.06.25MINEUS 0.00       6.25MIUSN  0.00       
0.00

NEUS 1638 61119 0 0.00CH 42.500 -69.000  0.0447  0
0.00.06.30MIEPB  5.75MIEQH  6.25MINEUS 6.25MIUSN  
6.25MIUSN

EPB  1663 2 51030 0.00   47.600 -70.100  0.0447  0
0.00.07.00MIEPB  6.75MIEQH  6.25MIEPRI 6.75MINEUS 
6.75MIUSN

DEWEY1690 4 5 0 0 0.00   17.500 -61.500 33.0  0  0
0.00.08.00__JWD  0.00       0.00       0.00       
0.00

DEWEY1692 0 0 0 0 0.00   18.200 -77.000 33.0  0  0
0.00.07.75__JWD  0.00       0.00       0.00       
0.00

EPRI 17271110 340 0.00ER 42.800 -70.600  0.0476  0
0.00.05.25MINEUS 5.25MISRA  5.75MIEQH  5.00MnEPR  
5.25MIEPRI

EPB  1732 91616 0 0.00   45.500 -73.600  0.0447  0
0.00.00.00       5.80MnEPR  0.00       5.80MnEPB  
0.00

EPRI 17371219 345 0.00ER 40.800 -74.000  0.0494  0
0.00.05.25MIEPRI 5.70MIEPB  5.25MISRA  5.25MINEUS 
5.25MIEQH

DEWEY175110 0 0 0 0.00   18.500 -71.000 33.0  0  0
0.00.07.30__JWD  0.00       0.00       0.00       
0.00

EPRI 17551118 91135.00ER 42.700 -70.300  0.0476  0
0.00.05.75MISRA  6.00MnEPR  5.75MINEUS 5.80mbEPR  
5.75MIEPRI

LAHR 19851231 2 459.70   59.653-152.307  4.3  2 31
4.60.04.40MLPMR  3.50MDLAHR 0.00       0.00       
0.00

CCN  19851231 61944.64   40.627-122.190 16.6 36 17
0.00.03.20MLBRK  2.09MLCCN  0.00       0.00       
0.00

LAHR 198512311220 8.69   59.815-152.162  0.6  2  0
0.00.02.80MLGIA  2.00MDLAHR 0.00       0.00       
0.00

LAHR 19851231122430.35   59.758-152.244  1.5  2  0
0.00.03.11MLGIA  2.00MDLAHR 0.00       0.00       
0.00

OGO  19851231182726.12   34.703 -97.459  5.0499  0
0.00.02.70MnTUL  2.50MDTUL  0.00       0.00       
0.00

EPB  19851231183418.00O  62.190-124.240  6.0679  0
0.00.03.90MnEPB  0.00       0.00       0.00       
0.00

EPB  19851231183418.00O  62.190-124.240  6.0679  7
3.90.03.90MnEPB  0.00       0.00       0.00       
0.00

NEV  1985123120 8 2.94   37.451-118.621 14.6 40 28
0.00.03.70MLBRK  3.50MDPAS  3.60MLPAS  3.63MLCCN  
3.20MLUNV

MBMG 19851231213212.00   44.614-110.978  1.0459  0
0.00.02.50MDESO  0.00       0.00       0.00       
0.00

EPB  19851231231627.00O  62.190-124.240  6.0679  0
0.00.03.50MnEPB  0.00       0.00       0.00       
0.00

12345678901234567890123456789012345678901234567890
12345678901234567890123456789012345678901234567890
123456789012
count    1         2         3         4         5
         6         7         8         9         0
         1

The Fields on these lines are: 

Characters Description 
1 - 5      Source 
6 - 9      Year 
10 - 11    Month 
12 - 13    Day 
14 - 15    Hour 
16 - 17    Minute 
18 - 22    Second 
23 - 25    The Authority for the Location, 
           Abbreviations used are from the 
           NEIC Earthquake Information System
           (EIS) developed by G. Reagor 
26 - 31    Latitude 
32 - 39    Longitude (West is negative) 
40 - 44    Depth in km 
45 - 47    Flynn - Engdahl Region Number 
48 - 50    Maximum number of stations 
           reporting the event 
51 - 53    Body wave magnitude (Usually from ISC)
54 - 56    Surface Wave Magnitude (Usually ISC) 
57 - 60    Other Magnitude 
61 - 67    Type and Source for Other Magnitude 
68 - 71    Magnitude 
72 - 78    Type & Source (Abbrev. from NEIC/EIS)  
79 - 82    Magnitude 
83 - 89    Type & Source (Abbrev. from NEIC/EIS) 
90 - 93    Magnitude
94 - 100   Type & Source (Abbrev. from NEIC/EIS) 
101 - 104  Magnitude 
105 - 112  Type & Source (Abbrev. from NEIC/EIS)

These records contain no information about which
magnitude has been selected as best.