Hypocenter file File contains the following fields in this order: Year, month, day, hour, minute, latitude, longitude, location code, location uncertainty (km), location uncertainty code, depth, moment magnitude, magnitude code, uncertainty of magnitude, magnitude uncertainty code, strike1, dip1, rake1, strike2, dip2, rake2, fault plane probability, focal mechanism code, main-shock probability, geographic code, and comment code. All data are numerical. * Year, month, hour, and minute are integers * Latitude and longitude are given in decimal degrees, with 3 decimal places * Location code refers to the catalog used to determine location; see catalog list below. * Location uncertainty (km) * Location uncertainty code: 1 from table below, 2 for formula derived from inter-comparisons, and 3 for individual estimate specific to given quake. * Depth is in km. Generic depth of 9.9 is used for all events before 1933. * Magnitude code refers to catalog from which magnitude was determined. See catalog list below. * Magnitude uncertainty code: same as the location uncertainty code above. * Strike 1, Dip1, and Rake1 apply to nodal plane presumably corresponding to the fault plane. * Strike 2, Dip2, and Rake2 apply to the presumed auxiliary plane. * Fault plane probability corresponds to the probability that plane 1 is actually the fault plane (rather than auxiliary plane); it should be over 50%, or planes 1 and 2 should be reversed. * Focal mechanism code refers to catalog from which focal mechanism taken. Code 0 means that focal mechanism was estimated using a weighted average of those from nearby earthquakes with known focal mechanisms. * Main-shock probability: 1 for main shock, 0 for aftershock. * Geographic code: 1 for inside the small box (defined below), 0 for events with any indication of rupture inside the large box. * Comment code: 0 means no comment; 1 means look in comment section under earthquake number and date. Regions of consideration. We will list all known events above magnitude 4.7 that have epicenter or evidence of rupture in the big box. We will indicate which events are inside the small box, where the SCSN catalog is more complete and reports more reliable locations and magnitudes. Big box 32, -122 37, -122 37, -114 32, -114 Small box 32.0, -114.4 34.8, -114.4 37.0, -117.15 35.7, -121.0 34.5, -120.8 32.0, -118.0. Assumed completeness in the small box (from Field et al, 1999); location uncertainty (km) and magnitude uncertainty, for events with no special treatment. TABLE 1 Date Range Completeness Loc. Uncert. Mag. uncert. 1800 < date <= 1850 m>= 7.5 100 0.7 1850 < date <= 1870 m>= 7.0 75 0.6 1870 < date <= 1880 m>= 6.8 50 0.5 1880 < date <= 1890 m>= 6.5 40 0.5 1890 < date <= 1925 m>= 6.0 30 0.4 1925 < date <= 1932 m>= 5.5 20 0.4 1932 < date <= 2002 m>= 4.7 15 0.3 TABLE 2: LIST OF RELM CATALOGS 1. Toppozada historical catalog, 1800-1999, M>=5.5 2. Deng & Sykes (1997) historical catalog with focal mechanisms, 1812-1994, M>=6.0 3. CDMG California catalog, 1800-1994, M>=4.0 4. CIT catalog, 1932-present 5. Deng & Sykes (1997) instrumental catalog with focal mechanisms, 1933-1995, M>=5.0 6. NCEDC catalog of focal mechanisms, Northern & Central California, M>=4.5, http://quake.geo.berkeley.edu/ncedc/catalog-search.html 7. SCEDC (Hauksson) revised catalog of focal mechanisms (M>4.9) 1975-2000 8. SCEDC (Hauksson) catalog of focal mechanisms 1975-2000, M>=4.7 http://www.scecdc.scec.org/ftp/catalogs/hauksson/Socal_focal/ 9. Harvard CMT catalog, 1977-present, M>5.5 10. USGS-MT (Sipkin) catalog, 1980-present 11. UCB-MT (Dreger) catalog of focal mechanisms -- surface-wave spectra results, 1988-2001 http://quake.geo.berkeley.edu/ncedc/mt.format.html -- explanations http://quake.geo.berkeley.edu/ncedc/mt.catalog.txt -- catalog 12. UCB-MT (Dreger) catalog of focal mechanisms -- complete, three-component, time domain result 13. CIT-MT (Lupei Zhu) catalog of focal mechanisms 1991-1999 14. Harris & Simpson catalog of focal mechanisms, 1968-1993, M>=5 15. L. Jones catalog of focal mechanisms 1986-1993, M>=4.5 TABLE 3: LIST OF RELM CATALOGS in Table Form Nickname dates minmag foc mech MagPeck LocPeck FocPeck 1. Toppozada 1800-1999 5.5 no 8 14 14 2. Deng & Sykes A 1812-1994 6.0 yes 12 12 11 3. RT&P 1900-1974 5.0 no 15 15 15 4. CIT 1932-2005 4.5 no 6 1 13 5. Deng & Sykes B 1933-1995 5.0 yes 13 13 12 6. NCEDC 1969-2000 4.5 yes 7 2 8 7. Hauksson A 1975-2000 4.9 yes 9 5 6 8. Hauksson B 1975-2000 4.7 yes 10 6 7 9. Harvard CMT 1977-2005 5.5 yes 1 7 1 10. Sipkin 1980-2001 5.5 yes 3 8 2 11. Dreger SW 1988-2001 4.5 yes 5 4 4 12. Dreger TD 1988-2005 4.5 yes 4 3 3 13. Zhu 1991-1999 4.5 yes 2 9 5 14. Harris&Simpson 1968-1993 5.0 yes 14 11 10 15. Jones 1986-1993 4.5 yes 11 10 9 PROCEDURE: 1. We select earthquakes from each of 15 catalogs (TABLES 2 and 3) satisfying our criteria. 2. We match earthquakes in these catalogs. Result is "Combined unedited S. California catalog" (Catalog I, see this WEB site). 3. Error analysis of matching earthquakes: magnitude, location and focal mechanism errors are investigated and hierarchical selection criteria (see TABLE 3) are established. 4. Combined point catalog (Catalog II) created, many earthquakes in it do not have focal mechanism solutions. 5. Combined point catalog (Catalog III) -- guess a focal mechanism from known solutions. 6. Combined point catalog (Catalog IV) -- a fault plane selected from using large earthquakes with extended sources, and its probability evaluated. This provisional final point catalog is also on the WEB "Combined provisional S. California catalog -- point sources". This catalog and both boxes are shown in the "Combined provisional S. California catalog -- point sources, PostScript image" diagram (see the WEB). Black beachballs -- known solutions; Orange beachballs -- guessed solutions.