189 lines
8.2 KiB
HTML
189 lines
8.2 KiB
HTML
<!DOCTYPE html>
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<title>ML_IDC — 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="ml-idc">
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<span id="global-ml-idc"></span><h1>ML_IDC<a class="headerlink" href="#ml-idc" title="Permalink to this heading">¶</a></h1>
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<p>CTBTO/IDC 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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<section id="amplitude">
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<h3>Amplitude<a class="headerlink" href="#amplitude" title="Permalink to this heading">¶</a></h3>
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<p>The SNSNR amplitudes are calculated on the vertical component seismograms.</p>
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</section>
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<section id="station-magnitude">
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<h3>Station Magnitude<a class="headerlink" href="#station-magnitude" title="Permalink to this heading">¶</a></h3>
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<div class="math">
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<p><img src="../_images/math/0fa61d5b31e348e0325d65192561b1f1af9c9cdd.png" alt="mag = \log10(A) + B(\Delta)"/></p>
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</div><p>with</p>
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<p>A: amplitude of type SBSNR</p>
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<p>B: attenuation correction function of epicentral distance in km</p>
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<p>The default corrections are read from a file installed at
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<code class="file docutils literal notranslate"><span class="pre">@DATADIR@/magnitudes/IDC/global.ml</span></code>. If that file is not present no magnitude
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will be calculated.</p>
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</section>
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<section id="station-corrections">
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<h3>Station corrections<a class="headerlink" href="#station-corrections" title="Permalink to this heading">¶</a></h3>
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<p>Station magnitudes can be computed with a station specific correction table
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which is configured in the global bindings. The parameter <a class="reference internal" href="global.html#confval-magnitudes.ML-IDC-.A"><code class="xref std std-confval docutils literal notranslate"><span class="pre">magnitudes.ML(IDC).A</span></code></a>
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takes a path and allows to use placeholders for network code (<code class="code docutils literal notranslate"><span class="pre">{net}</span></code>),
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station code (<code class="code docutils literal notranslate"><span class="pre">{sta}</span></code>) and location code (<code class="code docutils literal notranslate"><span class="pre">{loc}</span></code>).</p>
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<p>Example:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">magnitudes</span><span class="o">.</span><span class="n">ML</span><span class="p">(</span><span class="n">IDC</span><span class="p">)</span><span class="o">.</span><span class="n">A</span> <span class="o">=</span> <span class="nd">@DATADIR</span><span class="o">@/</span><span class="n">magnitudes</span><span class="o">/</span><span class="n">IDC</span><span class="o">/</span><span class="p">{</span><span class="n">net</span><span class="p">}</span><span class="o">.</span><span class="p">{</span><span class="n">sta</span><span class="p">}</span><span class="o">.</span><span class="n">ml</span>
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</pre></div>
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</div>
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<ul class="simple">
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<li><p>Amplitude unit in SeisComP: <strong>nanometer</strong> (nm)</p></li>
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<li><p>Time window: 4.5 s</p></li>
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<li><p>Default distance range: 0 - 20 deg</p></li>
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<li><p>Depth range: 0 - 40 km</p></li>
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</ul>
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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="#">ML_IDC</a><ul>
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<li><a class="reference internal" href="#description">Description</a><ul>
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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="#station-corrections">Station corrections</a></li>
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<h4>Next topic</h4>
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title="next chapter">ML</a></p>
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<h3>This Page</h3>
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Version <b>6.9.1</b> Release
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Copyright © gempa GmbH, GFZ Potsdam.
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