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76 lines
2.1 KiB
ReStructuredText
76 lines
2.1 KiB
ReStructuredText
.. _global_mlr:
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###
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MLr
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###
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The GNS/Geonet local magnitude
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Description
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===========
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The MLr magnitude provides a GNS/Geonet local magnitude (:cite:t:`ristau-2016`).
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MLr magnitudes are implemented by the *mlr* plugin.
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It is a modified version of the gempa ML magnitude developed
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at the Liverpool developer meeting (:cite:t:`gempa`) based on the SED
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:ref:`MLh<global_mlh>` magnitude.
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The *mlr* plugin is designed to use the MLv station amplitudes for computing
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MLr magnitudes.
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The magnitude uses a station correction term and the hypocentral distance.
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Amplitude
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=========
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The MLr amplitude calculation is that of :ref:`MLv<global_mlv>`.
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Station Magnitude
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=================
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The *mLr* plugin calculates individual MLr station local magnitudes from
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:ref:`MLv<global_mlv>` amplitudes as:
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.. math::
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MLr = \log10(waampl) - \log10(waamplRef)
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.. math::
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\log10(waamplRef)= 0.2869 - 1.272 \times 1^{-3} \times hypdistkm - 1.493 \times \log10(hypdistkm) + StationCorrection
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with
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* *waampl:* the :ref:`MLv<global_mlv>` amplitude.
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* *hypdistkm:* the distance from the sensor to the hypocenter in kilometers.
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* *A(station):* Station correction is given by module.trunk.NZ.WEL.MLR.params, A.
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Station Correction is set to be distance dependent.
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Format: "UpToKilometers A ; UpToNextKilometers A ".
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The option "nomag" disables the station magnitude.
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General parameters:
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* Amplitude unit in SeisComP: **millimeter** (mm) from :ref:`MLv<global_mlv>`
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* Time window: 150 s by :ref:`scautopick` or distance dependent
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* Distance range: 0 - 20 deg (hypocentral distance, hard-coded)
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* Depth range: 0 - 800 km (hard-coded)
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Network magnitude
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=================
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The GNS/Geonet Mlr local magnitude is using the default |scname| behaviour for
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the automatic network magnitudes.
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Hard-coded ranges are 0-20 degrees maximum distance and 800 km maximum depth.
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Configuration
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=============
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Add the mlr plugin to the existing plugins in the global configuration.
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Set the calibration parameters in the global bindings. Add MLr to the list of
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magnitudes in the configuration of :ref:`scamp` and :ref:`scmag` for computation
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and in :ref:`scesv` for visibility.
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