SOUTHERN CALIFORNIA EARTHQUAKE DATA CENTER CATALOG FORMAT ----------------------------------------------------------------- (06/17/03) The SCEDC catalog consists of hypocentral information for 1932 through the present. For information on catalog completeness and data sources, see http://www.data.scec.org/about/data_avail.htm. SCEDC-format catalog data (described below) are stored in yearly ASCII *.catalog files. ============================================================================== SCEDC CATALOG FORMAT specification (revised 06/17/03) ============================================================================== 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 local (le) regional (re) teleseism (ts) quarry blast (qb) sonic boom (sn) nuclear blast (nt) unknown event (uk) 27 4 f4.2 magnitude 32 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 'c' coda amplitude 'h' helicorder magnitude (short-period Benioff) 'd' coda duration magnitude 'n' no magnitude 36 7 f7.3 lat decimal degrees 44 8 f8.3 lon decimal degrees 53 5 f5.1 depth kilometers 59 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 61 8 a8 eventid event ID 70 3 i3 nph number of picked phases 75 4 i4 ngrams number of grams (i.e. # of station traces)