SUMMARY HEADER FORMAT YEAR 2000 ------- ------ ------ ---- ---- * indicates a new/revised field Start Fortran Col. Len. Format Data 1 4 I4 Year. * 5 8 4I2 Month, day, hour and minute. 13 4 F4.2 Origin time seconds. 17 2 F2.0 Latitude (deg). First character must not be blank. 19 1 A1 S for south, blank otherwise. 20 4 F4.2 Latitude (min). 24 3 F3.0 Longitude (deg). 27 1 A1 E for east, blank otherwise. 28 4 F4.2 Longitude (min). 32 5 F5.2 Depth (km). 37 3 F3.2 Magnitude from maximum S amplitude from NCSN stations * 40 3 I3 Number of P & S times with final weights greater than 0.1. 43 3 I3 Maximum azimuthal gap, degrees. 46 3 F3.0 Distance to nearest station (km). 49 4 F4.2 RMS travel time residual. 53 3 F3.0 Azimuth of largest principal error (deg E of N). 56 2 F2.0 Dip of largest principal error (deg). 58 4 F4.2 Size of largest principal error (km). 62 3 F3.0 Azimuth of intermediate principal error. 65 2 F2.0 Dip of intermediate principal error. 67 4 F4.2 Size of intermediate principal error (km). 71 3 F3.2 Coda duration magnitude from NCSN stations. * 74 3 A3 Event location remark. (See table 7 below). 77 4 F4.2 Size of smallest principal error (km). 81 2 2A1 Auxiliary remarks (See note below). 83 3 I3 Number of S times with weights greater than 0.1. 86 4 F4.2 Horizontal error (km). 90 4 F4.2 Vertical error (km). 94 3 I3 Number of P first motions. * 97 4 F4.1 Total of NCSN S-amplitude mag weights ~number of readings.* 101 4 F4.1 Total of NCSN duration mag weights ~number of readings. * 105 3 F3.2 Median-absolute-difference of NCSN S-amp magnitudes. 108 3 F3.2 Median-absolute-difference of NCSN duration magnitudes. 111 3 A3 3-letter code of crust and delay model. (See table 8 below). 114 1 A1 Last authority for earthquake N=NCSC (USGS), B=UC Berkeley. 115 1 A1 Most common P & S data source code. (See table 1 below). 116 1 A1 Most common duration data source code. (See cols. 68-69) 117 1 A1 Most common amplitude data source code. 118 1 A1 Coda duration magnitude type code 119 3 I3 Number of valid P & S readings (assigned weight > 0). 122 1 A1 S-amplitude magnitude type code 123 1 A1 "External" magnitude label or type code. Typically "L" (=ML) computed by UCB. This information is not computed by Hypoinverse, but passed along 124 3 F3.2 "External" magnitude. 127 3 F3.1 Total of the "external" magnitude weights (~ number of readings). 130 1 A1 Alternate amplitude magnitude label or type code (i.e. L for ML calculated by Hypoinverse from Wood Anderson amplitudes). 131 3 F3.2 Alternate amplitude magnitude. 134 3 F3.1 Total of the alternate amplitude mag weights ~no. of readings. 137 10 I10 Event identification number 147 1 A1 Preferred magnitude label code chosen from those available. 148 3 F3.2 Preferred magnitude, chosen by the Hypoinverse PRE command. 151 4 F4.1 Total of the preferred mag weights (~ number of readings). * 155 1 A1 Alternate coda duration magnitude label or type code (i.e. Z). 156 3 F3.2 Alternate coda duration magnitude. 159 4 F4.1 Total of the alternate coda duration magnitude weights. * 163 1 A1 Version number of information: 0=25 pick; 1=Final EW with MD; 2=ML added, etc. 0-9, then A-Z. Hypoinv. passes this through. 164 1 A1 Version # of last human review. blank=unreviewed, 1-9, A-Z.