--ORIGIN TIME (UT)-- YR MO DA Origin time date (universal time). HRMN Origin time hour, minute (universal time) SEC Origin time second (universal time). --LAT N-- DEG Epicenter latitude in degrees (north) MIN Epicenter latitude in minutes --LON W-- DEG Epicenter longitude in degrees (north) MIN Epicenter longitude in minutes DEPTH/KM Hypocenter depth jn km. N/RD Number of P & S readings with weights larger than 0.1. N/S Number of S readings with weights larger than 0.1. RMS/SEC The root-mean-square travel time residual, in sec, using all weights. ERH/KM The horizontal location error, in km, defined as the length of the largest projection of the three principal errors on a horizontal plane. The principal errors are the major axes of the error ellipsoid, and are mutually perpendicular. ERH thus approximates the major axis of the epicenter's error ellipse. ERZ/KM The depth error, in km, defined as the largest projection of the three principal errors on a vertical line. LOC/REMKS The first remark is the 3-letter region code based on location and depth. Two auxiliary 1-letter remarks (F for felt, etc.) may be derived from an optional remark field in the phase data (see phase data input format above). A (#) indicates convergence problems with the final solution such as running out of iterations, or failure of the hypocenter to reach a minimum in RMS. A minus sign (-) indicates the depth was held fixed either by the user or by insufficient data. PREF/MAG Preferred magnitude, followed by 1-letter magnitude-type code (see MAGS below) N/RD Number of observations, expressed as the total of their weights, used to compute the magnitude AZ/GAP The largest azimuthal gap between azimuthally adjacent stations (in degrees). MIN/DS Distance to the nearest station (in km). N/FM Number of first-motion readings CRU/MOD Name of velocity model used for computing earthquake location S./PF The most common data source of the (P) traveltime and (F) first-motion data N/VR Number of valid P & S readings (assigned weights larger than 0). DUR/MAG Coda duration magnitude computed from high-gain vertical components. Value is computed from weighted median of individual station duration magnitudes NUM/DUR Number of coda durations used in the computing median duration magnitude given as the total of their weights. MAGS-N Additional magnitudes for this event. Format is Mx=M_#, where Mx=type of magnitude, and x=E=Energy magnitude L=Local magnitude as computed by UC Berkeley W=Moment magnitude X=S-wave maximum amplitude magnitude Z=Low gain (Z component) coda duration magnitude of Hirshorn and Lindh (1989). M =magnitude value # =Number of observations, given as the total of their weights, used in computing M
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