FORMAT OF THE SCEDC CATALOG LISTINGS
(Revised 12/12/19)

COL       LEN     FORMAT     NAME       COMMENT
 1        10        a10      date      	YYYY/MM/DD
12        11        a11      time       HH:mm:SS:ss (UTC time--
						     7 hours ahead of Pacific Daylight Time
                                                     8 hours ahead of Pacific Standard Time)
24         2	    a2       eventtype  event type
                                            earthquake (eq) 
                                            quarry blast (qb) 
                                            sonic boom (sn)
					    nuclear blast (nt)
                                            unknown event (uk)
28         2        a1       gtype  geographical type
                                            local (l)
                                            regional (r)
                                            teleseism (t)
30         4        f4.2     magnitude
35	   1	    a1	     magtype	 type of magnitude 
                                            'e' energy magnitude
                                            'w' moment magnitude
                                            'b' body-wave magnitude
                                            's' surface-wave magnitude
                                            'l' local (WOOD-ANDERSON) magnitude
                                            'lr' revised local magnitude
                                            'c' coda amplitude
                                            'h' helicorder magnitude (short-period Benioff) 
                                            'd' coda duration magnitude
					    'n' no magnitude		
39         7	    f7.3     lat         decimal degrees
47         8	    f8.3     lon         decimal degrees
56         5	    f5.1     depth       kilometers
62         1	    a1       quality     location quality
					    'A'  +- 1 km horizontal distance
                                                 +- 2 km depth
                                            'B'  +- 2 km horizontal distance
                                                 +- 5 km depth
                                            'C'  +- 5 km horizontal distance 
                                                 no depth restriction
                                            'D'  >+- 5 km horizontal distance
					    'Z'	 no quality listed in database
64         8        a8       eventid	 event ID
73         3	    i3       nph         number of picked phases
78         4        i4       ngrams      number of grams 
                                           (i.e. # of station traces)

EXAMPLE OF A SCEDC CATALOG LISTING:

#YYY/MM/DD HH:mm:SS.ss ET GT MAG  M    LAT       LON      DEPTH Q  EVID      NPH NGRM
2019/07/04 17:14:09.20 eq  l 0.37 l   35.70550 -117.49350  10.9 A 37229236   17  113
2019/07/04 17:14:10.46 eq  l 0.50 l   35.69117 -117.53533  13.0 B 37229244   11  153
2019/07/04 17:15:35.50 eq  l 0.42 l   35.71083 -117.48133  11.6 A 37229260   19  120
2019/07/04 17:15:47.19 eq  l 1.43 l   35.70683 -117.50183   9.0 A 38443151   65 1739
2019/07/04 17:16:18.57 eq  l 0.62 l   35.70900 -117.49033  10.2 A 37229268   19  201
2019/07/04 17:27:00.04 eq  l 1.45 l   34.17483 -117.49883   3.0 A 38443167   98 2330
2019/07/04 17:27:35.14 eq  l 0.54 l   35.70250 -117.50167   9.6 A 37229276   19  168
2019/07/04 17:33:49.00 eq  l 6.40 w   35.70533 -117.50383  10.5 A 38443183  105 3359
2019/07/04 17:35:01.66 eq  l 4.49 lr  35.64400 -117.56717   4.6 A 38443191   69 3356
2019/07/04 17:35:46.34 eq  l 3.63 l   35.69367 -117.43700   7.7 B 37222356   19 3142