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Detection.md

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Detection Format Specification

Description

Detection is a format designed to encode the basic information of an earthquake event Detection. Detection uses the JSON standard.

Usage

Detection is intended for use in seismic data messaging between seismic applications.

Output

    {
      "Type"        : "Detection",
      "ID"          : String,
      "Source"      :
      {
         "AgencyID" : String,
         "Author"   : String
      },
      "Hypocenter"  :
      {
          "Latitude"        : Number,
          "Longitude"       : Number,
          "Depth"           : Number,
          "Time"            : ISO8601,
          "LatitudeError"   : Number,
          "LongitudeError"  : Number,
          "DepthError"      : Number,
          "TimeError"       : Number
      },
      "DetectionType"   : String,
      "DetectionTime"   : ISO8601,
      "EventType" :
      {
          "Type"      : String,
          "Certainty" : String
      },
      "Bayes"           : Number,
      "MinimumDistance" : Number,
      "RMS"             : Number,
      "Gap"             : Number,
      "Detector"        : String,
      "Data"            : [PickJSON and/or CorrelationJSON Objects, ...]
    }

Glossary

Required Values:

These are the values required to define a detection.

  • Type - A string that identifies this message as a detection.
  • ID - A string containing an unique identifier for this Detection.
  • Source - An object containing the source of the Detection, see Source.
  • Hypocenter - An object containing the hypocenter of the Detection, see Hypocenter.

Optional Values:

The following are supplementary values that may or may not be provided as part of s detection.

  • DetectionType - A string that identifies whether the Detection is New, Update, or Final.
  • DetectionTime - A string containing the UTC time this detection was made, i.e. how quickly after origin time was this detection created, in the ISO8601 format YYYY-MM-DDTHH:MM:SS.SSSZ.
  • EventType - An object containing the event type of the correlation, see EventType.
  • Bayes - A decimal number that identifies bayesian statistic for this Detection.
  • Sigma - A decimal number indicating the standard deviation of the hypocenter time measurement.
  • Data - An array of Pick, and / or Correlation objects used to generate this Detection.
  • MinimumDistance - The minimum distance to the closest station.
  • Detector - A string identifying the detection grid, algorithm, or other information.