QuakeML

An XML schema for seismology

Danijel SchorlemmerSilvio MarainiManfred Baer

ETH Zürich, Swiss Seismological Service, Switzerland

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ETHSwiss Federal Institute of Technology Zürich

ObjectivesSED

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One catalog format definition for

Data exchange

Network Analysis-softwareNetwork NetworkAnalysis-software Analysis-software

Different seismological aspects

Seismicity analysisTomographyFull waveform analysis

ObjectivesSED

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Additional Constraints

Use only open standardsOpen source & multi-platform toolsPlatform independentFlexible & extensible

XMLSED

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Why XML (eXtensible Markup Language)?

Open standards W3C: XML, XPath, XSLT, XLink, XPointer, XML Schema, ...

Open source & multi-platform toolsXerces, Xalan (Apache), libxml2, libxslt (Gnome)

Platform independentASCII-files with defined encodings

Flexible & extensibleXML-Namespaces

XMLSED

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Different seismological aspectsMulti-level definition

Level Feature1 simple location/origin/time/depth/magnitude2 1 + multiple locations per event3 2 + quality information/general info4 3 + pick times/other station info5 4 + waveforms6 5 + channel info/calibration data7 ...

Example QuakeML Level 1SED

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<?xml version="1.0"?><events> <event id="0001"> <location main="yes" id="00010002" method="inversion" analysis-type="manual"> <origin-time fixed="no" timezone="UTC" error="00/00/00T00:00:01"> <year>2002</year> <month>05</month> <day>01</day> <hour>01</hour> <minute>11</minute> <second>55.1</second> </origin-time> <latitude fixed="no" unit="degree" error="0">47.23</latitude> <longitude fixed="no" unit="degree" error="0">9.50</longitude> <depth fixed="no" unit="km" error="0.1">3.1</depth> <magnitude fixed="no" type="ML" stations="7" error="0.1">1.6</magnitude> </location> </event> <event id="0002">

...

</event></events>

AdvantagesSED

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Modern and historic catalogs incomplete origin timesincomplete location and magnitude informationmagnitudes and intensities

XSLT, XPath for creating lower level QuakeML, any XML, HTML, SVG, PDF, ... see Demo!

Inter-level compatibility

Private namespace extensions

Automatic validation possible (XML schema)

Possibilities and Features: XSLTSED

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XML Transformations:QuakeML + XSL = HTML (PDF, JPG, ...)

XSLT

QuakeML XSL

HTML

Possibilities and Features: NamespacesSED

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<?xml version="1.0"?><events xmlns="http://quakeml.ethz.ch/ns/quakeml"xmlns:sed="http://sed.ethz.ch/ns/sed">

<event id="0001"> <location main="yes" id="00010002" method="inversion" analysis-type="manual"> <origin-time fixed="no" timezone="UTC" error="00/00/00T00:00:01"> <year>2002</year> <month>05</month> <day>01</day> <hour>01</hour> <minute>11</minute> <second>55.1</second> </origin-time> <latitude fixed="no" unit="degree" error="0">47.23</latitude> <longitude fixed="no" unit="degree" error="0">9.50</longitude>

<sed:coordinates><sed:latitude>237</sed:latitude><sed:longitude>412</sed:longitude>

<sed:coordinates> <depth fixed="no" unit="km" error="0.1">3.1</depth> <magnitude fixed="no" type="ML" stations="7" error="0.1">1.6</magnitude> </location> </event> <event id="0002">

...

</event></events>

Possibilities and Features: Historic CatalogsSED

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<?xml version="1.0"?><events> <event id="0001"> <location main="yes" id="00010002" method="historic" analysis-type="guess"> <origin-time fixed="no" timezone="UTC" error="00/00/00T06:00:00"> <year>1356</year> <month>10</month> <day>18</day> <hour>1</hour> <minute></minute> <second></second> </origin-time> <latitude fixed="no" unit="degree" error="0.1">47.46</latitude> <longitude fixed="no" unit="degree" error="0.1">7.60</longitude> <depth fixed="no" unit="km" error="5">12</depth> <magnitude fixed="no" type="ML" error="0.5">6.9</magnitude> </location> </event> <event id="0002">

...

</event></events>

OutlookSED

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Definition of levels 1-4

Review of this definition

Test implementation (SED, SCEC, RELM)

Setup of a QuakeML website Documentation of progressRepository of schemas, stylesheets, etc.