Description

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Epicenters of Historical Earthquakes, 2000 (1:3,500,000) - Shows the locations of all known historical earthquakes in Indiana with Magnitude greater than 3.0. Earthquake locations are derived from both instrumented recordings and calculations from historical accounts. For earthquakes before 1954, magnitudes and locations of epicenters may have substantial errors. For earthquakes after 1954, magnitudes and locations of epicenters are presumably more accurate. Magnitude codes describe the methodologies used to determine magnitude values. The layer is an amalgam of points created from catalogs maintained by Saint Louis University (Department of Earth and Atmospheric Sciences) and the U.S. Geological Survey (National Earthquake Information Center).

Dataset Attributes

  • IGS ID Map Number
    Number
    1 to 44
  • Moment Magnitued (EM)
    Number
    3 to 4.97
  • Depth (km below surface)
    Number
    0 to 20
  • Latitude
    Number
    37.9 to 41.62
  • Longitude
    Number
    -88 to -84.927
  • Year
    Number
    1817 to 2012
  • Month
    Number
    1 to 12
  • Day
    Number
    1 to 30
  • Hour
    Number
    0 to 23
  • Minute
    Number
    0 to 58
  • Seconds
    Number
    0 to 59.5
  • Magnitude
    Number
    3 to 4.97
  • erh
    Number
    0 to 38
  • Efac
    Number
    0 to 1.914
  • SM
    Number
    0 to 0.521
  • Temporary ID number
    Text
    {"value"=>"TMP01381", "count"=>1} (), {"value"=>"TMP03233", "count"=>1} (), {"value"=>"TMP03006", "count"=>1} (), {"value"=>"TMP14703", "count"=>1} (), {"value"=>"TMP02591", "count"=>1} (), {"value"=>"TMP06906", "count"=>1} (), {"value"=>"TMP00726", "count"=>1} (), {"value"=>"TMP03665", "count"=>1} (), {"value"=>"TMP04115", "count"=>1} (), {"value"=>"TMP03883", "count"=>1} ()
  • Shape
    Number
  • OBJECTID_1
    Number

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