Table of Contents for this Document File: Name of File Contributing Source File directory/location Information on the region covered Variable Table Format File Sample Data Variable File Additional Documentation ==================================================================== ==================================================================== ==================================== Variable Table The variable table contains a list of parameters contained in the data as well as information on the existence of histograms which can be viewed in GeoVu. File gou.tab for this catalog follows ==================================== DATA SET TITLE: gou PRINCIPAL INVESTIGATOR: Gouin, Pierre, Earthquake History of Ethiopia and the Horn of Africa (1979, International Development Research Council, Ottawa, Canada. CONTRIBUTING ORGANIZATION: DATA FILE: gou.bin #\data\africa\east\gou\gou.bin NUMBER OF RECORDS: 791 ASCII FILE SIZE: 64862 BINARY FILE SIZE: 61698 SUMMARY: Earthquake History of Ethiopia & Horn of Africa, 1400-1977 we suggest the book which is the source of the GOU catalog: Gouin, Pierre, Earthquake History of Ethiopia and the Horn of Africa (1979, International Development Research Council, Ottawa, Canada. 1. VARIABLE NAME HISTOGRAM NAME 2. ASCII FORMAT BINARY FORMAT NO. & MIN/MAX VALUES Stat End Type Prc Stat End Type Prc Min. Max. #nonzero source SOURCE.CST 1 3 char 0 1 3 char 0 GOU GOU 791 century_and_year CENTURY_.LST 4 8 short 0 57 58 short 0 1400 1977 791 month MONTH.LST 9 10 short 0 59 60 short 0 1 12 782 day DAY.LST 11 12 short 0 61 62 short 0 1 31 759 hour HOUR.LST 13 14 short 0 63 64 short 0 1 30 650 minute MINUTE.LST 15 16 short 0 65 66 short 0 1 59 596 second SECOND.LST 17 19 short 1 67 68 short 1 1 6 390 latitude_abs NO HISTOGRAM 20 24 long 3 NOT IN BINARY latitude_ns NO HISTOGRAM 25 25 char 0 NOT IN BINARY longitude_abs NO HISTOGRAM 26 31 long 3 NOT IN BINARY longitude_ew NO HISTOGRAM 32 32 char 0 NOT IN BINARY depth DEPTH.LST 33 35 short 0 69 70 short 0 1 630 532 mb_magn MB_MAGN.LST 36 38 short 2 14 15 short 2 0 0 0 MB NO HISTOGRAM 39 40 constant 0 NOT IN BINARY flag_isoseismal FLAG_ISO.CST 41 43 char 0 16 18 char 0 0 0 0 intensity INTENSIT.CST 44 44 char 0 19 19 char 0 2 9 310 flags_ngdc FLAGS_NG.CST 45 50 char 0 20 25 char 0 0 0 0 flag_diastrophic FLAG_DIA.CST 45 45 char 0 26 26 char 0 0 0 0 flag_tsunami FLAG_TSU.CST 46 46 char 0 27 27 char 0 0 0 0 flag_seiche FLAG_SEI.CST 47 47 char 0 28 28 char 0 0 0 0 flag_volcanism FLAG_VOL.CST 48 48 char 0 29 29 char 0 0 0 0 flag_non_tectonic FLAG_NON.CST 49 49 char 0 30 30 char 0 0 0 0 flag_infrasonic FLAG_INF.CST 50 50 char 0 31 31 char 0 0 0 0 Flinn_Engdahl_region FLINN_EN.LST 51 53 short 0 32 33 short 0 554 570 791 ms_local_magn MS_LOCAL.LST 54 55 short 1 34 35 short 1 0 0 0 MS NO HISTOGRAM 56 57 constant 0 NOT IN BINARY z_h Z_H.CST 58 58 char 0 36 36 char 0 0 0 0 flag_cultural FLAG_CUL.CST 59 59 char 0 37 37 char 0 F F 419 flag_other FLAG_OTH.CST 60 60 char 0 38 38 char 0 0 0 0 magn_other MAGN_OTH.LST 61 63 short 2 39 40 short 2 0 0 0 magn_other_authority MAGN_OT1.CST 64 66 char 0 41 43 char 0 0 0 0 international_data_exchange_event INTERNAT.CST 67 67 char 0 44 44 char 0 0 0 0 flag_depth_control_PDE FLAG_DEP.CST 68 68 char 0 45 45 char 0 0 0 0 number_of_stations_or_quality NUMBER_O.CST 69 71 char 0 46 48 char 0 0 0 0 time_authority TIME_AUT.CST 72 72 char 0 49 49 char 0 ! ! 791 ml_magn_local ML_MAGN_.LST 73 75 short 2 50 51 short 2 2 6 508 ml_magn_local_scale ML_MAGN1.CST 76 77 char 0 52 53 char 0 ML ML 584 ml_magn_local_source ML_MAGN2.CST 78 80 char 0 54 56 char 0 AAE TLN 584 latitude LATITUDE.LST NOT IN ASCII 4 7 long 3 4 21 791 longitude LONGITUD.LST NOT IN ASCII 8 11 long 3 14 46 791 depth_negate DEPTH_NE.LST NOT IN ASCII 12 13 short 0 -630 0 532 year_decimal YEAR_DEC.LST NOT IN ASCII 71 78 double 10 1400.000 1977.989 791 ==================================== Format File The format file is a listing of the variable names, types and positions within the binary and ASCII files. The file is composed of two parts - the first section is the format of the ASCII file, the second, the format of the binary file. The ASCII format file *.af must be renamed to *.afm to be used with the Freeform utility. Likewise, the binary format file *.bf must be renamed to *.bfm. The structure of this file is: Field 1: Variable name Field 2: First position of variable in line Field 3: Last position of variable in line Field 4: Type of variable Field 5: Precision of variable **Refer to Freeform user's manual for further information See format file gou.fmt in this directory ==================================== ======================================================== Sample Data A representative sample of data records showing the first 10 lines and the last 10 lines of the ASCII data file(i.e. the .dat file). The first and last 10 records of gou.dat follow ======================================================== GOU 1400 13500N 41870E 10 558 F !600MLGOU GOU 1431 13000N 41000E 5 558 F !500MLGOU GOU 1433 14100N 38700E 10 558 F !500MLGOU GOU 1518 14000N 39000E 10 558 F !500MLGOU GOU 1553 14000N 39000E 10 558 F !500MLGOU GOU 159309 13000N 39500E 10 558 F !500MLGOU GOU 16081223000000011250N 41700E 10 558 F !500MLGOU GOU 16081223000000011300N 42000E 10 558 F !500MLGOU GOU 16310210000000011250N 41700E 10 558 F !500MLGOU GOU 16310210100000011250N 41700E 10 558 F !500MLGOU . . . . GOU 197605292259001 8700N 42000E 33 558 !440MLGOU GOU 197606130105000 8800N 41100E 33 558 !320MLGOU GOU 19761107055300715820N 41423E 34 554 !480MLGOU GOU 19761107055300815830N 41420E 34 554 !480MLGOU GOU 19761116125303315910N 41920E 33 554 !490MLGOU GOU 19770627141302016154N 40013E 33 554 !430MLGOU GOU 19770708062300210940N 39630E 38 558 !500MLGOU GOU 19770709031303011867N 43503E 33 558 !350MLGOU GOU 19771205100205712695N 40474E 33 558 !450MLGOU GOU 19771228024503616659N 40278E 33 554 !660MLGOU ==================================== Variable File This file contains statistical information on each of the variables in the data set. The variable file gou.var for this catalog follows ==================================== Input file : gou.bin Input format file: gou.fmt No requested precision, Approximate number of sorting bins = 100 source: 791 values read minimum: GOU found at record 1 maximum: GOU found at record 1 Summary file: source.cst Histogram data precision: 0, Number of sorting bins: 16 latitude: 791 values read minimum: 4.300 found at record 197 maximum: 21.200 found at record 284 Summary file: latitude.lst Histogram data precision: 0, Number of sorting bins: 15 longitude: 791 values read minimum: 14.140 found at record 730 maximum: 46.360 found at record 427 Summary file: longitud.lst Histogram data precision: 0, Number of sorting bins: 47 depth_negate: 791 values read minimum: -630 found at record 387 maximum: 0 found at record 249 Summary file: depth_ne.lst Histogram data precision: 0, Number of sorting bins: 1 mb_magn: 791 values read minimum: 0.00 found at record 1 maximum: 0.00 found at record 1 Summary file: mb_magn.lst flag_isoseismal: 791 values read minimum: found at record 1 maximum: found at record 1 Summary file: flag_iso.cst intensity: 791 values read minimum: found at record 1 maximum: 9 found at record 14 Summary file: intensit.cst flags_ngdc: 791 values read minimum: found at record 1 maximum: found at record 1 Summary file: flags_ng.cst flag_diastrophic: 791 values read minimum: found at record 1 maximum: found at record 1 Summary file: flag_dia.cst flag_tsunami: 791 values read minimum: found at record 1 maximum: found at record 1 Summary file: flag_tsu.cst flag_seiche: 791 values read minimum: found at record 1 maximum: found at record 1 Summary file: flag_sei.cst flag_volcanism: 791 values read minimum: found at record 1 maximum: found at record 1 Summary file: flag_vol.cst flag_non_tectonic: 791 values read minimum: found at record 1 maximum: found at record 1 Summary file: flag_non.cst flag_infrasonic: 791 values read minimum: found at record 1 maximum: found at record 1 Summary file: flag_inf.cst Histogram data precision: 0, Number of sorting bins: 8 Flinn_Engdahl_region: 791 values read minimum: 554 found at record 66 maximum: 570 found at record 445 Summary file: Flinn_En.lst Histogram data precision: 0, Number of sorting bins: 1 ms_local_magn: 791 values read minimum: 0.0 found at record 1 maximum: 0.0 found at record 1 Summary file: ms_local.lst z_h: 791 values read minimum: found at record 1 maximum: found at record 1 Summary file: z_h.cst flag_cultural: 791 values read minimum: found at record 13 maximum: F found at record 1 Summary file: flag_cul.cst flag_other: 791 values read minimum: found at record 1 maximum: found at record 1 Summary file: flag_oth.cst Histogram data precision: 0, Number of sorting bins: 1 magn_other: 791 values read minimum: 0.00 found at record 1 maximum: 0.00 found at record 1 Summary file: magn_oth.lst magn_other_authority: 791 values read minimum: found at record 1 maximum: found at record 1 Summary file: magn_ot1.cst international_data_exchange_event: 791 values read minimum: found at record 1 maximum: found at record 1 Summary file: internat.cst flag_depth_control_PDE: 791 values read minimum: found at record 1 maximum: found at record 1 Summary file: flag_dep.cst number_of_stations_or_quality: 791 values read minimum: found at record 1 maximum: found at record 1 Summary file: number_o.cst time_authority: 791 values read minimum: ! found at record 1 maximum: ! found at record 1 Summary file: time_aut.cst Histogram data precision: 0, Number of sorting bins: 6 ml_magn_local: 791 values read minimum: 0.00 found at record 13 maximum: 6.80 found at record 144 Summary file: ml_magn_.lst ml_magn_local_scale: 791 values read minimum: found at record 13 maximum: ML found at record 1 Summary file: ml_magn1.cst ml_magn_local_source: 791 values read minimum: found at record 13 maximum: TLN found at record 567 Summary file: ml_magn2.cst Histogram data precision: 0, Number of sorting bins: 109 century_and_year: 791 values read minimum: 1400 found at record 1 maximum: 1977 found at record 787 Summary file: century_.lst Histogram data precision: 0, Number of sorting bins: 13 month: 791 values read minimum: 0 found at record 1 maximum: 12 found at record 7 Summary file: month.lst Histogram data precision: 0, Number of sorting bins: 32 day: 791 values read minimum: 0 found at record 1 maximum: 31 found at record 206 Summary file: day.lst Histogram data precision: 0, Number of sorting bins: 25 hour: 791 values read minimum: 0 found at record 1 maximum: 30 found at record 730 Summary file: hour.lst Histogram data precision: 0, Number of sorting bins: 60 minute: 791 values read minimum: 0 found at record 1 maximum: 59 found at record 371 Summary file: minute.lst Histogram data precision: 0, Number of sorting bins: 7 second: 791 values read minimum: 0.0 found at record 1 maximum: 6.3 found at record 321 Summary file: second.lst Histogram data precision: 0, Number of sorting bins: 47 depth: 791 values read minimum: 0 found at record 249 maximum: 630 found at record 387 Summary file: depth.lst Histogram data precision: 0, Number of sorting bins: 109 year_decimal: 791 values read minimum: 1400.0001160895 found at record 1 maximum: 1977.9893551370 found at record 791 Summary file: year_dec.lst ==================================== The bibliographic file gou.bib for this catalog follows ==================================== This is the NGDC Bibliography for East Africa ---. A Catalogue of Felt Earthquakes in Kenya, 1892 - 1969. Kenya: Seismology Unit, Geology Department, University of Nairobi, Kenya, July 1971. Alsinawi, S. A. Baban S. G. and Issa A. S.Xerox Copy. Baghdad, Iraq: Department of Geology, College of Science, University of Baghdad, Jadiriyah, 1985. Fairhead, J. D. and Girdler R. W. "The Seismicity of the Red Sea, Gulf of Aden and Afar Triangle." Phil. Trans. Roy. Soc. Lond. Volume 267 A. (1970): Pages 49-74. Gorshkov, G. P. "The Seismicity of Africa." Review of Natural Resources (1963): 103-51. Gouin, P. "Seismic Zoning in Ethiopia." Bulletin of the Geophysical Observatory .No. 17 (1976): 1-46. Heck, N. H. and Davis R. M. Jr. "A List of Earthquakes Published in 1688." Bulletin of the Seismological Society of America Vol. 36.No. 4 (1946): 363-72. Loupekine, I. S. A Catalogue of Felt Earthquakes in Kenya, 1892 - 1969. Nairobi, Kenya: University of Nairobi, 1971. Wery, A. "Seismic Observations and Meteorology of Ruanda." Communications of the Royal Observatory of Belgium No. 133.Series No. 43: 1-12. ======================================================== Additional Documentation Any other files contributed to or generated by NGDC as documentation for the data base follows. ======================================================== ======================================================== ======================================================== ======================================================== ======================================================== Following is an abbreviated summary of the format for the ASCII version of this file - *.dat. For a more extensive version of this format, please see the file: formtap.txt in /data/globecat/pde directory Line Position Field Comments 1-3 Data source Source from which all or most of the data were obtained 4 B.C. data indicator Minus sign indicates pre-Christian era. 4-12 Date (Universal Positions 4-8 year, 9-10 month, and 11-12 day Time--UT) 13-19 Origin Time Computed, or observed if controlled explosion (Universal Time --UT) with shot timed. Positions 13-14 hour, 15-16 minute, and 17-19 second. Implied decimal between positions 18 and 19. 20-24 Geographic latitude Usually given to three decimal places, (decimal degrees) although this degree of accuracy is not necessarily applicable. Implied decimal between positions 21 and 22. 25 N/S North or south latitude 26-31 Geographic longitude Usually given to three decimal places. (decimal degrees) Implied decimal between positions 28 and 29. 32 E/W East or West longitude 33-35 Focal depth (km) See also position 68. 36-38 Body-wave (Mb) average Implied decimal between positions 36 and 37. value Value as determined by *PDE program. 39-40 MB If magnitude in 36-38 is given. 41-43 Isoseismal map, Three-letter abbreviation indicating the fault plane solution, publication of an isoseismal (intensity) map. or both USE, United States Earthquakes; *PDE. Preliminary Determination of Epicenters; WEL, New Zealand Seismologoy Report, Wellington, N.Z.; BSS, Bulleting of the Seismological Society of America; ZUR, Zurich, Switzerland; NTR, Nature Magazine. FPS indicates a fault- plane solution was computed. BOT means that both a fault plane solution and an isoseismal map were produced by U.S. Geological Survey. 44 Maximum intensity Modified Mercalli Scale or converted to MM Scale. 1-9 = I-IX, X = X, E= XI, T=XII. See Appendix 5. 45-50 Associated Phenomena 45 Diastrophism code F = Surface faulting U = Uplift/subsidence D = Faulting and uplift/subsidence. 46 Tsunami code T = Tsunami generated Q = Possible Tsunami 47 Seiche code S = Seiche Q = Possible Seiche 48 Volcanism Code V = Earthquake associated with volcanism 49 Nontectonic code R = Rockburst C = Coal bump or rockburst in coal mine. M = Meteoritic source. E = Explosion -- accidental, controlled or suspected I = Collapse L = Lights or other such visual phenomena seen. 50 Waves generated code T = T-wave A = Acoustic Wave. G = Gravity wave. B = Both A and G. 51-53 Flinn-Engdahl geo- As described by Flinn and others (1974) graphic region no. See appendix 6. 54-55 Surface wave (Ms) Implied decimal between positions 54 and 55. average value Value determined by PDE program. (IASPEI for- mula used). 56-57 MS If magnitude in 54-55 is given. 58 Component Z or H Z = Ms computed from long-period vertical component H = Ms computed from long-period horizontal component. 59 Cultural Effects C, D, F or H in position 59 indicates reported casualties, damage, felt information or earthquake heard, respectively. The nota- tions listed here provide a brief summary of the earthquake effects on populations and buildings. Casualty, damage, or felt reports associated with a particular earthquake do not imply that the effects were noted at the epi- central position. Especially with offshore earthquakes, the maximum intensity may be reported at some distance from the source of the shock. An "F" in this position (felt but no damage reported) having no accompanying intensity (position 44) is likely associated with an intensity of I - III on the Modified Mercalli Scale; however, tha actual intensity may be higher. 60 Unusual Events L = Liquefaction. G = Geyser/fumerol S = Landsliding, avalanche. B = Sand Blows C = Ground cracking, not associated with faulting. V = Visual phenomena or lights. O = Olfactory phenomena. M = More than one of the above. 61-63 Other Magnitude Value obtained from several sources; unspecified magnitude type but generally Ms (implied decimal between positions 61 and 62). Fractions have been converted to decimal num- bers, or encoded as follows: 6 - 6 1/4 = 6.13 6 1/4 = 6.25 6 1/4 - 6 1/2 = 6.38 6 1/2 = 6.50 6 1/2 - 6 3/4 = 6.63 6 3/4 = 6.75 6 3/4 - 7 = 6.88 For any other range, median values are listed 64-66 Authority for magni- See source codes in appendix 4. tude in positions 61-63 67 Special event X = International Date Exchange (IDE) designator earthquake 68 Depth control A = Assigned Designator D = Restrained depth based on 2 or more reported pP's identified as such. G = Depth restrained by Geophysicist N = Held at 33 km (Normal Depth) where data not sensitive to depth for a shallow- focus. S = Depth control aided by use of S-phase data * = Less well-constrained free-depth solution; 90% confidence it lies within 8.5 and 16 km (used since January 1985) ? = Poorly constrained free depth solution (used since January 1985) 69-71 Number of stations/ Number of P and/or P' arrivals used in hypo= Quality Indicators center solution. Quality Indicators are as listed below: Source Style and Indicators _____________________________________________________________________________ Source Style and Indicators Single-letter designator in position 69 72 Authority for time and Blank = Authority same as source (positions coordinates/other 1-3) quality indicators 73-75 Local Magnitude Implied decimal between positions 73 and 74. 76-77 Magnitude scale used If magnitude in 73-75 is given. Generally ML; USGS will use MB. ML = Local magnitude MB = Body-wave magnitude CL = Coda-length magnitude MS = Surface-wave magnitude DR = Duration Magnitude NU = Nuttli Magnitude MW = Moment magnitude (Abe, 1983, 1984) MR = Rautian magnitude (Kondorskaya and Shebalin, 1982) LH = Magnitude Mlh (Kondorskaya and Shebalin 1982) LG = Lg body-wave magnitude (Nuttli, 1973) SL = Magnitude from Stover and others , 1984 SH = Magnitude from Stover and others, 1984 SA = Magnitude from Stover and others, 1984 SU = Magnitude of unknown origin from Stover and others, 1984 K = Russian Energy class magnitude MC = Reported magnitude of unknown origin MG = Reported magnitude of unknown origin 78-80 Authority for value in 73-75. ===================================================== ===================================================== ===================================================== END OF DOCUMENTATION FILE =====================================================