XML-SEED format and its application to synthetic seismogram database

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XML-SEED format and its application to synthetic
seismogram database

• Seiji Tsuboi
• IFREE/JAMSTEC

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XML Representation of SEED format

• eXtensible Markup Language (XML) is a text-based
  language.
• XML documents use tags to establish
  hierarchical data structure and named values.
• XML can be used for most of all major platforms.
• XML is a basic technology for networking.

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Advantages of using XML

• Header structure of SEED is modular, which can be
  easily represented by XML.
• Data structure of XML is flexible, because length
  of any fields is not fixed.
• XML has its schema language XML-Schema, which
  can be used for validation of XML document.

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SEED Format Organization

• Control headers (formatted in ASCII)
• information about the volume, the
  station-channels, and the data
• Time series (binary, unformatted)
• seismic waveform data

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Conversion of control header

• lt?xml version"1.0" ?gt
• ltxseedgt
• ltvolume_control_headergt
• lt!--For blockettes in volume control
  header --gt
• lt/volume_control_headergt
• ltabbreviation_dictionary_control_headergt
• lt!--For blockettes in abbreviation
  dictionary control header --gt
• lt/ abbreviation_dictionary_control_header gt
• ltstation_control_headergt
• lt!--For blockettes in volume control
  header --gt
• lt/station_control_headergt
• lttimespan_control_headergt
• lt!--For blockettes in volume control
  header --gt
• lt/timespan_control_headergt
• lt/xseedgt

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http//www.jamstec.go.jp/pacific21/xmlninja/
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Synthetic seismogram database

• Synthetic seismograms, which are accurate up to 5
  sec and longer, will be calculated by
  Spectral-Element Method on the Earth Simulator
  for fully 3-D Earth model.
• Database will be created for all the broadband
  seismograph stations over the globe.
• Minimum magnitude of the earthquake will be
  chosen considering the available CPU time
  (currently Mwgt6.5).

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XML-SEED format for synthetics

• ltxseedgt
• ltvolume_indexgt
• ltidentifiergt
• lttimespan_indexgt
• lt/volume_indexgt
• ltmethodgt
• ltmethod_typegtSEMlt/method_typegt
• ltSEM_parametersgt
• lt/methodgt
• lteventsgt
• lteventgt
• ltmoment_tensorgt
• lt/eventsgt
• ltnetworksgt
• ltstationsgt
• ltchannelsgt
• ltdictionarygt
• ltdata_recordgt
• lt/xseedgt

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XML-SEED format for synthetics

• ltdata_recordgt
• ltdata_record_typegtGLOBALlt/data_record_typegt
• ltGLOBAL_data_headergt
• ltstation_identifiergt
• ltchannel_identifiergt
• lt/GLOBAL_data_headergt
• ltGLOBAL_chunkgt
• -2.904506e-18 -6.672627e-18 -6.978924e-18
• lt/GLOBAL_chunkgt
• lt/data_recordgt

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