207 lines
9.8 KiB
HTML
207 lines
9.8 KiB
HTML
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<title>MLr — SeisComP Release documentation</title>
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<!-- span class="title">SeisComP Release</span -->
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<span class="version">6.9.1</span>
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<a href="../toc/extensions/global.html" accesskey="U">global</a>
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<section id="mlr">
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<span id="global-mlr"></span><h1>MLr<a class="headerlink" href="#mlr" title="Permalink to this heading">¶</a></h1>
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<p>The GNS/Geonet local magnitude</p>
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<section id="description">
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<h2>Description<a class="headerlink" href="#description" title="Permalink to this heading">¶</a></h2>
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<p>The MLr magnitude provides a GNS/Geonet local magnitude (<span id="id1">Ristau <em>et al.</em> [<a class="reference internal" href="../base/references.html#id64" title="J. Ristau, D. Harte, and J. Salichon. A Revised Local Magnitude (ML) Scale for New Zealand Earthquakes. Bull. Seismol. Soc. Am., 106(2):, 2016. doi:10.1785/0120150293.">58</a>]</span>).
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MLr magnitudes are implemented by the <em>mlr</em> 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 (<span id="id2"><em>gempa GmbH</em> [<a class="reference internal" href="../base/references.html#id122" title="gempa GmbH. The SeisComP development and maintenance company. URL: https://www.gempa.de/.">28</a>]</span>) based on the SED
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<a class="reference internal" href="global_mlh.html#global-mlh"><span class="std std-ref">MLh</span></a> magnitude.
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The <em>mlr</em> 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.</p>
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</section>
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<section id="amplitude">
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<h2>Amplitude<a class="headerlink" href="#amplitude" title="Permalink to this heading">¶</a></h2>
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<p>The MLr amplitude calculation is that of <a class="reference internal" href="global_mlv.html#global-mlv"><span class="std std-ref">MLv</span></a>.</p>
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</section>
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<section id="station-magnitude">
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<h2>Station Magnitude<a class="headerlink" href="#station-magnitude" title="Permalink to this heading">¶</a></h2>
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<p>The <em>mLr</em> plugin calculates individual MLr station local magnitudes from
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<a class="reference internal" href="global_mlv.html#global-mlv"><span class="std std-ref">MLv</span></a> amplitudes as:</p>
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<div class="math">
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<p><img src="../_images/math/3b314bd56ab94770a2a623ebc60d9d2527f3eda6.png" alt="MLr = \log10(waampl) - \log10(waamplRef)"/></p>
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</div><div class="math">
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<p><img src="../_images/math/af651135a1453eaa75fcec6a10fd5195d34d83b0.png" alt="\log10(waamplRef)= 0.2869 - 1.272 \times 1^{-3} \times hypdistkm - 1.493 \times \log10(hypdistkm) + StationCorrection"/></p>
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</div><p>with</p>
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<ul>
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<li><p><em>waampl:</em> the <a class="reference internal" href="global_mlv.html#global-mlv"><span class="std std-ref">MLv</span></a> amplitude.</p></li>
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<li><p><em>hypdistkm:</em> the distance from the sensor to the hypocenter in kilometers.</p></li>
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<li><p><em>A(station):</em> Station correction is given by module.trunk.NZ.WEL.MLR.params, A.
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Station Correction is set to be distance dependent.</p>
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<p>Format: “UpToKilometers A ; UpToNextKilometers A “.
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The option “nomag” disables the station magnitude.</p>
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</li>
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</ul>
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<p>General parameters:</p>
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<ul class="simple">
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<li><p>Amplitude unit in SeisComP: <strong>millimeter</strong> (mm) from <a class="reference internal" href="global_mlv.html#global-mlv"><span class="std std-ref">MLv</span></a></p></li>
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<li><p>Time window: 150 s by <a class="reference internal" href="scautopick.html#scautopick"><span class="std std-ref">scautopick</span></a> or distance dependent</p></li>
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<li><p>Distance range: 0 - 20 deg (hypocentral distance, hard-coded)</p></li>
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<li><p>Depth range: 0 - 800 km (hard-coded)</p></li>
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</ul>
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</section>
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<section id="network-magnitude">
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<h2>Network magnitude<a class="headerlink" href="#network-magnitude" title="Permalink to this heading">¶</a></h2>
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<p>The GNS/Geonet Mlr local magnitude is using the default <cite>SeisComP</cite> 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.</p>
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</section>
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<section id="configuration">
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<h2>Configuration<a class="headerlink" href="#configuration" title="Permalink to this heading">¶</a></h2>
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<p>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 <a class="reference internal" href="scamp.html#scamp"><span class="std std-ref">scamp</span></a> and <a class="reference internal" href="scmag.html#scmag"><span class="std std-ref">scmag</span></a> for computation
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and in <a class="reference internal" href="scesv.html#scesv"><span class="std std-ref">scesv</span></a> for visibility.</p>
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</section>
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<h3><a href="../index.html">Table of Contents</a></h3>
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<ul>
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<li><a class="reference internal" href="#">MLr</a><ul>
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<li><a class="reference internal" href="#description">Description</a></li>
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<li><a class="reference internal" href="#amplitude">Amplitude</a></li>
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<li><a class="reference internal" href="#station-magnitude">Station Magnitude</a></li>
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<li><a class="reference internal" href="#network-magnitude">Network magnitude</a></li>
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<li><a class="reference internal" href="#configuration">Configuration</a></li>
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Version <b>6.9.1</b> Release
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