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Discussion on package StrongMotion

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SurfaceRupture | Rupture | OriginRecordReference | OriginDescription | StrongMotionRecord | StrongMotionParameters | FootwallHangingwallIndicator |

StrongMotion overview page

StrongMotion class diagram

SurfaceRupture [type]

Some hints (flag, text, reference) on whether an event reportedly produced surface rupture.

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

SurfaceRupture.observed (type boolean)

If this flag is used, it is recommended to provide either text or literature evidence.

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

Note that although maybe given in text or literature, there is no parametric representation of uncertainty.
PhilippKästli, 2015-06-30

SurfaceRupture.evidence (type string)

What evidence supports the presence of surface rupture? (This field allows for amplification-specific classification, however no classification is currently enforced.)

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Example: FabianEuchner, 2014-10-21

SurfaceRupture.literatureSource (type rm:LiteratureSource)

Bibliographic information on the most relevant paper supporting the statement made in SurfaceRupture.evidence

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Example: FabianEuchner, 2014-10-21

Rupture [element]

Description of some boundary parameters of the the actually experienced slip process. This is kept separate from the concept of 'fault' (as a geological feature supposed (or: observed) to be capable to host rupture processes.

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

While the peak motion part of the schema is actively used, and thus got relevant peer review, the rupture description has been specified in the framework of the NERA project, however, afaik, it is not actively used. I am not sure whether it is adequate to host a detailed rupture description (referring to the EQ source process, corresponding models, in-situ observation and complex analysis results) in the same schema as the non-time-dynamic instrumental peak motion observations. Time line and audience could be too different
PhilippKästli, 2015-06-30

Rupture.publicID (type co:ResourceReference)

Globally unique identifier.

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Example: FabianEuchner, 2014-10-21

Rupture.faultID (type co:ResourceReference)

Reference to the fault on which the rupture happened. Note that while geometry is different, it is currently implied that rupture happenes on a single fault, or a subset of it.

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

With a future, more elaborate fault description (including potentially capabilities to describe distinct fault sections, and coherent faults), this linking is subject to change.

PhilippKästli, 2015-06-30

Rupture.displacement (type co:RealQuantity)

Maximum relative displacement on the fault plain.

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Example: FabianEuchner, 2014-10-21

Maybe we need also a mean displacement?
PhilippKästli, 2015-06-30

Rupture.area (type co:RealQuantity)

rupture area in [m^2]

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Example: FabianEuchner, 2014-10-21

Rupture.length (type co:RealQuantity)

Length of the rupture area in the direction of its largest extent, measured on the rupture plain and given in [m]

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

Is it relevant to distinguish between the longest extension and the longest horizontal extension? (in large quakes, horizontal orientation of the largest linear extent is typically implied)
PhilippKästli, 2015-06-30

Rupture.width (type co:RealQuantity)

Largest extension of the rupture area perpendicular to the line of its largest extent (measured on the rupture plain and given in [m])

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

Rupture.momentReleaseTop5km (type co:RealQuantity)

Moment release on the part of the rupture area not deeper than 5 km below surface, in [N*m]

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

Rupture.riseTime (type co:RealQuantity)

Duration of the coherent rupture process, in [s]

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

Rupture.ruptureGeometryWKT (type string)

description of the geometry of the rupture "plain" in Well Known Text format (https://en.wikipedia.org/wiki/Well-known_text) - types polygon or multipolygon recommended; in addition curvepolygon and circularstring are possible.

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

Rupture.ruptureVelocity (type co:RealQuantity) . mean rupture velocity in [m/s]

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

Question to the NERA community: The differentiation between SlipVelocity and RuptureVelocity is not clear to me.
PhilippKästli, 2015-06-30

Rupture.shallowAsperity (type boolean)

Presence of one or more shallow asperities within the top 5 km below surface

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Example: FabianEuchner, 2014-10-21

Rupture.shallowAsperityDepth (type co:RealQuantity)

Depth of the shallowest relevant asperity, in [m]

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Example: FabianEuchner, 2014-10-21

Rupture.slipVelocity (type co:RealQuantity)

mean slip velocity, in [m/s]

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

Question to the NERA community: The differentiation between SlipVelocity and RuptureVelocity is not clear to me.
PhilippKästli, 2015-06-30

Rupture.stressdrop (type co:RealQuantity)

in [Pa]

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Example: FabianEuchner, 2014-10-21

Rupture.surfaceRupture (type sm:SurfaceRupture)

cfr. type definition of surface rupture

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Example: FabianEuchner, 2014-10-21

Rupture.vr_to_vs (type co:RealQuantity)

phase velocity divided by shearwave velocity of the ruptured medium

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

Rupture.fwHwIndicator (type sm:FootwallHangingwallIndicator)

TODO

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Example: FabianEuchner, 2014-10-21

Rupture.referredStudy (type rm:LiteratureSource)

Relevant literature source for this rupture parametrization.

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

OriginRecordReference [element]

Link between an origin and a waveform record. Note that one waveform record may be linked to multiple concurrencing origins (location results) of the same event, resulting in different distance metrics.

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

OriginRecordReference.strongMotionRecordID (type co:ResourceReference)

Globally unique identifier of the waveform record (reference, foreign key)

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Example: FabianEuchner, 2014-10-21

OriginRecordReference.distRupturedArea (type co:RealQuantity)

Shortest distance between recording station and rupture surface, in [m]

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

OriginRecordReference.campbellDistance (type co:RealQuantity)

TODO

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Example: FabianEuchner, 2014-10-21

OriginRecordReference.joynerBooreDistance (type co:RealQuantity)

Shortest distance from a site to the surface projection of the rupture surface, in [m]

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

OriginRecordReference.ruptureToStationAzimuth (type co:RealQuantity)

(Smallest) angle between the vector of the main rupture direction, and the line from hypocenter to the recording station; in [degrees].

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

"Line from Hypocenter to recording station": Direct connection or fastest wave path?
PhilippKaestli, 2015-07-21

OriginRecordReference.closestFaultDistance (type co:RealQuantity)

Closest distance between the station and the ruptured area on the fault plane; in [meters]

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

OriginRecordReference.preEventLength (type float)

Length of the pre-event window of the waveform data provided in the referenced record, assuming the origin time of the referring origin. In [seconds]

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

OriginRecordReference.postEventLength (type float)

TODO

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Example: FabianEuchner, 2014-10-21

OriginDescription [element]

Conceptually an extension of a BasicEventDescription.origin for some elements/attributes of relevance (by now, the number of strong motion traces available, and the rupture description.

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

OriginDescription.publicID (type co:ResourceReference)

Unique identifier of the OriginDescription instance.

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Example: FabianEuchner, 2014-10-21

OriginDescription.originID (type co:ResourceReference)

Public Identifier referring to the (BasicEventDescription) origin which is extended here.

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Example: FabianEuchner, 2014-10-21

OriginDescription.waveformCount (type int)

number of waveforms (datasets from individual streams) available for, and linked to this event.

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Example: FabianEuchner, 2014-10-21

OriginDescription.creationInfo (type rm:CreationInfo)

Data provenance

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Example: FabianEuchner, 2014-10-21

OriginDescription.rupture (type sm:Rupture)

see sm:Rupture.

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Example: FabianEuchner, 2014-10-21

OriginDescription.originRecordReference (type sm:OriginRecordReference)

Reference element to describe the many:many relationship between traces from different stations/streams, and one or multiple concurrencing origins derive from them.

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

StrongMotionRecord [element]

Description of a (processed) waveform file representing the recorded motion snipplet from one data channel for one seismic event.

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

StrongMotionRecord.publicID (type co:ResourceReference)

Globally unique, public identifier of the waveform (URI).

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

StrongMotionRecord.startTime (type co:TimeQuantity)

Time of the first recorded sample (typically without uncertainty)

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Example: FabianEuchner, 2014-10-21

StrongMotionRecord.duration (type float)

Duration of the recording; in [seconds]

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Example: FabianEuchner, 2014-10-21

StrongMotionRecord.waveformStreamID (type wf:WaveformStreamID)

Reference to the registration parameters of the recording channel: network, station, sensorlocation, 3-letter-channel indicator, plus a data field for a non-structured unique identifier

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Example: FabianEuchner, 2014-10-21

StrongMotionRecord.filterChain (type co:ResourceReference)

Public identifier as a reference (foreign key) to a filter chain object ( see wf:FilterChain

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Example: FabianEuchner, 2014-10-21

StrongMotionRecord.waveformFile (type rm:FileResource)

File resource pointer (with metadata) for the (binary or ascii) waveform data.

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Example: FabianEuchner, 2014-10-21

StrongMotionRecord.gainUnit (type string)

ground motion unit the trace represents after applying the gain, expressed in an expression of SI base units (e.g. "m/s", "m/s**2")

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Example: FabianEuchner, 2014-10-21

StrongMotionRecord.resampleRateDenominator (type int)

Denominator of the fraction representing the number of samples per second.

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Example: FabianEuchner, 2014-10-21

StrongMotionRecord.resampleRateNumerator (type int)

Numerator of the fraction representing the number of samples per second.

The concept of expressing a natural floating point value is similar to the sampling rate as represented in GFZ's inventory XML or FDSN's stationXML (SampleRateRatio)

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Example: FabianEuchner, 2014-10-21

StrongMotionRecord.owner (type rm:Contact)

Contact information of the data owner (as this includes also intellectual property on the reprocessing procedure, it may be different from the station owner.)

Discussion area: please fill in your comments below (between the horizontal lines) and tag with your user name and the date of your comment.
Example: FabianEuchner, 2014-10-21

StrongMotionRecord.creationInfo (type rm:CreationInfo)

Creation metadata of the trace/waveform file.

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Example: FabianEuchner, 2014-10-21

StrongMotionRecord.peakMotion (type wf:PeakMotion)

individual peak motion value. Different peak motion values derived from the same waveform file may refer to different metrices (velocity, acceleration, duration...), and/or different processing methods

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Example: FabianEuchner, 2014-10-21

StrongMotionParameters [element]

Top level element of this QuakeML package

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Example: FabianEuchner, 2014-10-21

StrongMotionParameters.publicID (type co:ResourceReference)

unique identificator of the QuakeML/StrongMotionParameters document

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Example: FabianEuchner, 2014-10-21

StrongMotionParameters.description (type string)

Free text description of the document

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Example: FabianEuchner, 2014-10-21

StrongMotionParameters.creationInfo (type rm:CreationInfo)

Data provenance of the document

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Example: FabianEuchner, 2014-10-21

StrongMotionParameters.originDescription (type sm:OriginDescription)

(see respective type description)

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Example: FabianEuchner, 2014-10-21

StrongMotionParameters.strongMotionRecord (type sm:StrongMotionRecord)

(see respective type description)

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Example: FabianEuchner, 2014-10-21

StrongMotionParameters.comment (type rm:Comment)

Comment on a StrongmotionDescription document.

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Example: FabianEuchner, 2014-10-21

FootwallHangingwallIndicator [enumeration]

TODO

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Example: FabianEuchner, 2014-10-21

FOOTWALL: footwall
HANGING_WALL: hanging wall