You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
76 lines
2.1 KiB
Plaintext
76 lines
2.1 KiB
Plaintext
1 year ago
|
.. _global_mlr:
|
||
|
|
|
||
|
|
###
|
||
|
|
MLr
|
||
|
|
###
|
||
|
|
|
||
|
|
The GNS/Geonet local magnitude
|
||
|
|
|
||
|
|
Description
|
||
|
|
===========
|
||
|
|
|
||
|
|
|
||
|
|
The MLr magnitude provides a GNS/Geonet local magnitude (:cite:t:`ristau-2016`).
|
||
|
|
MLr magnitudes are implemented by the *mlr* plugin.
|
||
|
|
It is a modified version of the gempa ML magnitude developed
|
||
|
|
at the Liverpool developer meeting (:cite:t:`gempa`) based on the SED
|
||
|
|
:ref:`MLh<global_mlh>` magnitude.
|
||
|
|
The *mlr* plugin is designed to use the MLv station amplitudes for computing
|
||
|
|
MLr magnitudes.
|
||
|
|
The magnitude uses a station correction term and the hypocentral distance.
|
||
|
|
|
||
|
|
|
||
|
|
Amplitude
|
||
|
|
=========
|
||
|
|
|
||
|
|
The MLr amplitude calculation is that of :ref:`MLv<global_mlv>`.
|
||
|
|
|
||
|
|
|
||
|
|
Station Magnitude
|
||
|
|
=================
|
||
|
|
|
||
|
|
The *mLr* plugin calculates individual MLr station local magnitudes from
|
||
|
|
:ref:`MLv<global_mlv>` amplitudes as:
|
||
|
|
|
||
|
|
.. math::
|
||
|
|
|
||
|
|
MLr = \log10(waampl) - \log10(waamplRef)
|
||
|
|
|
||
|
|
.. math::
|
||
|
|
|
||
|
|
\log10(waamplRef)= 0.2869 - 1.272 \times 1^{-3} \times hypdistkm - 1.493 \times \log10(hypdistkm) + StationCorrection
|
||
|
|
|
||
|
|
with
|
||
|
|
|
||
|
|
* *waampl:* the :ref:`MLv<global_mlv>` amplitude.
|
||
|
|
* *hypdistkm:* the distance from the sensor to the hypocenter in kilometers.
|
||
|
|
* *A(station):* Station correction is given by module.trunk.NZ.WEL.MLR.params, A.
|
||
|
|
Station Correction is set to be distance dependent.
|
||
|
|
|
||
|
|
Format: "UpToKilometers A ; UpToNextKilometers A ".
|
||
|
|
The option "nomag" disables the station magnitude.
|
||
|
|
|
||
|
|
General parameters:
|
||
|
|
|
||
|
|
* Amplitude unit in SeisComP: **millimeter** (mm) from :ref:`MLv<global_mlv>`
|
||
|
|
* Time window: 150 s by :ref:`scautopick` or distance dependent
|
||
|
|
* Distance range: 0 - 20 deg (hypocentral distance, hard-coded)
|
||
|
|
* Depth range: 0 - 800 km (hard-coded)
|
||
|
|
|
||
|
|
|
||
|
|
Network magnitude
|
||
|
|
=================
|
||
|
|
|
||
|
|
The GNS/Geonet Mlr local magnitude is using the default |scname| behaviour for
|
||
|
|
the automatic network magnitudes.
|
||
|
|
Hard-coded ranges are 0-20 degrees maximum distance and 800 km maximum depth.
|
||
|
|
|
||
|
|
|
||
|
|
Configuration
|
||
|
|
=============
|
||
|
|
|
||
|
|
Add the mlr plugin to the existing plugins in the global configuration.
|
||
|
|
Set the calibration parameters in the global bindings. Add MLr to the list of
|
||
|
|
magnitudes in the configuration of :ref:`scamp` and :ref:`scmag` for computation
|
||
|
|
and in :ref:`scesv` for visibility.
|