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 wom.tab for this catalog follows ==================================== DATA SET TITLE: wom PRINCIPAL INVESTIGATOR: Wysession, Michael E., Emile A. Okal and Kristin L. Miller, 1991, "Intraplate Seismicity of the Pacific Basin the 1913 - 1988," PAGEOPH (Pure and Applied Geophysics), vol. 135, no. 2, p. 261-359. CONTRIBUTING ORGANIZATION: DATA FILE: wom.bin NUMBER OF RECORDS: 398 ASCII FILE SIZE: 26666 BINARY FILE SIZE: 18706 SUMMARY: The WOM Pacific Intraplate catalog of earthquakes is from: Wysession, Michael E., Emile A. Okal and Kristin L. Miller, 1991, "Intraplate Seismicity of the Pacific Basin the 1913 - 1988," PAGEOPH (Pure and Applied Geophysics), vol. 135, no. 2, p. 261-359. This is a clean catalog fo events in the Intraplate region of the Pacific ocean. 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 E WIA 398 day DAY.LST 5 6 short 0 4 5 short 0 1 31 398 month MONTH.LST 8 9 short 0 6 7 short 0 1 12 398 century_and_year CENTURY_.LST 11 14 long 0 8 11 long 0 1918 1988 398 hour HOUR.LST 16 17 short 0 12 13 short 0 1 23 385 minute MINUTE.LST 19 20 short 0 14 15 short 0 1 59 390 seconds SECONDS.LST 22 25 float 1 16 17 short 1 1 59 390 latitude LATITUDE.LST 27 32 float 2 18 21 long 2 -69 53 393 longitude LONGITUD.LST 34 40 float 2 22 25 long 2 -180 180 398 depth DEPTH.LST 42 44 short 0 26 27 short 0 5 69 237 magn_other MAGN_OTH.LST 46 48 float 1 28 29 short 1 1 7 296 magn_other_type MAGN_OT1.CST 50 52 char 0 30 32 char 0 MB WEL 296 number_of_arrivals NUMBER_O.LST 54 56 short 0 33 34 short 0 1 60 128 origin_time_std ORIGIN_T.LST 59 62 float 2 35 36 short 2 1 9 101 code_relocation CODE_REL.CST 65 65 char 0 37 37 char 0 1 6 397 depth_negate DEPTH_NE.LST NOT IN ASCII 38 39 short 0 -69 0 237 year_decimal YEAR_DEC.LST NOT IN ASCII 40 47 double 10 1918.396 1988.845 398 ==================================== 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 wom.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 wom.dat follow ======================================================== G 25 5 1918 19 29 19.8 -30.85 -91.88 10 7.0 PAS 11 1.75 1 ISS 22 3 1921 11 54 18.4 -40.67 -142.99 10 4 4.44 1 ISS 10 2 1921 19 42 14.5 -0.79 177.90 10 1 ISS 20 2 1922 7 43 45.9 -15.31 -166.43 10 5 1.36 1 ISS 23 5 1923 5 12 48.8 -5.39 -96.91 10 4 0.87 1 ISS 10 5 1924 2 48 47.8 -35.21 -169.56 10 5 1.61 1 ISS 24 6 1924 13 48 47.9 8.38 -119.09 10 5 3.06 1 ISS 5 5 1924 15 57 15.8 11.30 156.80 10 4 0.16 1 ISS 17 6 1924 20 51 19.4 0.78 -129.32 10 4 2.13 1 ISS 1 8 1925 2 26 3.8 -29.38 -164.34 10 4 0.53 1 . . . . GS 7 3 1988 8 50 44.1 -44.52 -93.26 10 4.9 MB 2 GS 21 10 1988 13 45 46.9 -46.52 -153.37 10 5.0 MS 2 PPT 5 11 1988 14 2 54.8 -15.20 -150.78 12 3.2 PPT 5 GS 7 3 1988 15 21 6.8 41.67 152.22 10 5.9 MB 3 GS 21 6 1988 19 7 20.2 -37.80 -148.80 10 4.6 MB 2 GS 5 6 1988 20 55 18.9 31.26 -126.04 10 2 G-R 23 1 1988 22 1 57.3 -15.25 -116.19 10 5.1 MB 3 GS 22 9 1988 22 28 44.6 23.85 -167.20 20 5.5 MB 3 GS 2 10 1988 23 21 3.2 -7.07 -88.62 10 4.7 MB 2 PPT 2 10 1988 23 41 14.0 -9.47 -140.07 0 4.4 PPT 5 ==================================== Variable File This file contains statistical information on each of the variables in the data set. The variable file wom.var for this catalog follows ==================================== Input file : wom.bin Input format file: wom.fmt No requested precision, Approximate number of sorting bins = 100 source: 398 values read minimum: E found at record 83 maximum: WIA found at record 338 Summary file: source.cst Histogram data precision: 0, Number of sorting bins: 31 day: 398 values read minimum: 1 found at record 10 maximum: 31 found at record 106 Summary file: day.lst Histogram data precision: 0, Number of sorting bins: 12 month: 398 values read minimum: 1 found at record 27 maximum: 12 found at record 16 Summary file: month.lst Histogram data precision: 0, Number of sorting bins: 60 century_and_year: 398 values read minimum: 1918 found at record 1 maximum: 1988 found at record 388 Summary file: century_.lst Histogram data precision: 0, Number of sorting bins: 24 hour: 398 values read minimum: 0 found at record 28 maximum: 23 found at record 26 Summary file: hour.lst Histogram data precision: 0, Number of sorting bins: 60 minute: 398 values read minimum: 0 found at record 143 maximum: 59 found at record 320 Summary file: minute.lst Histogram data precision: 0, Number of sorting bins: 60 seconds: 398 values read minimum: 0.0 found at record 52 maximum: 59.9 found at record 143 Summary file: seconds.lst Histogram data precision: 0, Number of sorting bins: 102 latitude: 398 values read minimum: -68.54 found at record 357 maximum: 53.96 found at record 299 Summary file: latitude.lst Histogram data precision: 0, Number of sorting bins: 117 longitude: 398 values read minimum: -179.90 found at record 148 maximum: 180.00 found at record 339 Summary file: longitud.lst Histogram data precision: 0, Number of sorting bins: 21 depth: 398 values read minimum: 0 found at record 73 maximum: 69 found at record 202 Summary file: depth.lst Histogram data precision: 0, Number of sorting bins: 8 magn_other: 398 values read minimum: 0.0 found at record 2 maximum: 7.2 found at record 46 Summary file: magn_oth.lst magn_other_type: 398 values read minimum: found at record 2 maximum: WEL found at record 81 Summary file: magn_ot1.cst Histogram data precision: 0, Number of sorting bins: 32 number_of_arrivals: 398 values read minimum: 0 found at record 3 maximum: 60 found at record 64 Summary file: number_o.lst Histogram data precision: 0, Number of sorting bins: 6 origin_time_std: 398 values read minimum: 0.00 found at record 3 maximum: 9.31 found at record 13 Summary file: origin_t.lst code_relocation: 398 values read minimum: 0 found at record 176 maximum: 6 found at record 125 Summary file: code_rel.cst Histogram data precision: 0, Number of sorting bins: 21 depth_negate: 398 values read minimum: -69 found at record 202 maximum: 0 found at record 73 Summary file: depth_ne.lst Histogram data precision: 0, Number of sorting bins: 60 year_decimal: 398 values read minimum: 1918.3967446728 found at record 1 maximum: 1988.8458598968 found at record 391 Summary file: year_dec.lst ==================================== The bibliographic file wom1.bib for this catalog follows ==================================== This is the NGDC Bibliography for the Oceania Region ---. "Earthquake-Origins in the South-West Pacific in 1910." Transactions of the New Zealand Institute Vol. 44.Bulletin 39 (Hector Observatory) (1912): 139-42. ---. "Seismicity of the South Atlantic." Journal of Geophysical Research Vol. 73.No. 12 (1968): 3807-20. ---. "The Seismicity of the Arctic." Bulletin of the Seismological Society of America Vol. 55.No. 2 (1965): 501-18. ---. "The Seismicity of the Lower South Antilles." Journal for Geophysics Year 6.Book 4 - 7: 361-69. . "Damaging Earthquake Reports for Guam." Xerox Copy, Data file. Hodgson, E. A. "The Seismicity of the Arctic." Journal of the Royal Astronomical Society of Canada Volume XXIV, No. 5.May-June, 1930 (1930): Pages 201-10. Hodgson, J. H. Bath M. Jensen H. Kvale A. Linden N. A. Murphy L. M. Shebalin N. V. Tryggvason E. and Vesanen E. "Seismicity of the Arctic." Annals of the International Geophysical Year Vol. 30: 33-66. Hodgson, J. H. Båth M. Jensen H. Kvale A. Linden N. A. Murphy L. M. Shebalin N. V. Tryggvason E. and Vesanen E. "Seismicity of the Arctic." Reprinted From Annals of the International Geophysical Year Volume XXX--Seismology: Pages 33-66. Hogben, G. "Earthquake-Origins in the South-West Pacific in 1910." Transactions of the New Zealand Institute, Dominion Observatory Volume XLIV.Dominion Observarory Bulletin No. S 4 (1912): Pages 139-42. Keith, A. Hodgson E. A. de Smitt V. P. et. al. "The Grandbanks Earthquake of 1929." Nature, Dominion Observatory, Western Union Telegraph Company, Eastern Section of the Seismological Society of America, Et. Al. (1929-1964): Various. Stover, C. W. "Seismicity of the Indian Ocean." Journal of Geophysical Research Vol. 71.No. 10 (1966): 2575-81. Sykes, L. R. "Seismicity of the South Pacific Ocean." Journal of Geophysical Research Volume 68.No. 21 (1963): Pages 5999. Tams, E. "Die Seismischen Verhältnisse Des Offenen Atlantischen Ozeans." Sonderdruck Aus Gerlands Beiträge Zur Geophysik. Bd. IVIII.Heft 3 (1927): Pages 319-53. ======================================================== Additional Documentation Any other files contributed to or generated by NGDC as documentation for the data base follows. ======================================================== ==================================== File wom.txt follows ==================================== The WOM Pacific Intraplate catalog of earthquakes is from: Wysession, Michael E., Emile A. Okal and Kristin L. Miller, 1991, "Intraplate Seismicity of the Pacific Basin the 1913 - 1988," PAGEOPH (Pure and Applied Geophysics), vol. 135, no. 2, p. 261-359. Catalog Sources: ADH: Angra de Heroismo, Observatorio Afonso Chaves, Ponta Delgada, Azores ANT: Antofagasta, Departamento de Geologia y Geofisica, Universidad de Chile Santiago, Chile BER: Seismological Observatory, Bergen, Norway BGS: British Geological Survey, Global Seismology Unit, Edinburgh, U.K, CGS: United States Coast and Geodetic Survey CNSK: Canadian and Scandinavian Networks G-R: Gutenberg and Richter, 1941, 1954 GS: United States Geological Survey ERL: Earth Resources Lab, Geological Survey, Canada HEL: Institute of Seismology, University of Helsinki, Finland HFS: Hafgors Observatory, Stockholm, Sweden LAO: Large Aperture Seismic Array (LASA) LDG, SYK: Lamont-Doherty Geological Observatory, Palisades, New York MDD: Instituto Geografico y Catastral, Servico de Sismologia e Ingenieria Sismica, Madrid, Spain NAO: NTNF/NORSAR, Kjeller, Norway NGD: National Geophysical Data Center, Boulder, Colorado, USA OTT: Seismology Division Energy, Mines and Resources, Ottawa, Ontario, Canada, PDE: Preliminary Determination of Epicenters, NEIC, Golden, Colorado, USA ROM: Instituto Nazionale di Geogisica, Rome, Italy SPGM: Service de Physique du Globe, Morocco TAC: Tacabaya, Instituto de Geofisica, Mexico TRN: Seismic Research Unit, University of the West Indies, Trinidad UPP: Seismological Institute, Sweden USE: United States Earthquake Bulletins number_of_arrivals: the number of travel-time arrivals used in the final relocation. origin_time_std: the standard deviation of the travel-time residuals of the relocation. code_relocation: Code = 1: (123 events) Relocation yields a statistically significant intraplate epicenter. Code = 2: (72 events) Relocation confirms the bulletin listing as intraplate and the bulletin listing has been retained. Code = 3: (52 events) Epicenter very well located by the reporting agency with no relocation deemed necessary. Code = 4: (28 events) Modern Event located by a local array at either Wake Island, Enewetak Island or Ocean Bottom seismometers, retained in this catalog without relocation. Code = 5: (128 events) Modern event located by the local array of Polynesian stations, not modified in this catalog. Code = 6: (3) Events which are part of a swarm, not included in this catalog. ======================================================== ======================================================== END OF DOCUMENTATION FILE ======================================================== ========================================================