SCRUG-NA/2025
3
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[installation] Change to nightly

Browse Source
This commit is contained in:
Dirk Rössler
2025-10-30 12:04:59 +01:00
parent 2ff097f9d1
commit a31bc45cce
1441 changed files with 60368 additions and 56360 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
share/doc/seiscomp/html/apps/global_mb_bb.html
View File

@ -4,7 +4,7 @@
<head>
<meta charset="utf-8" /><meta name="viewport" content="width=device-width, initial-scale=1" />
<title>mB_BB &#8212; SeisComP Release documentation</title>
<title>mB_BB &#8212; SeisComP Development documentation</title>
<link rel="stylesheet" href="../_static/pygments.css" type="text/css" />
<link rel="stylesheet" href="../_static/seiscomp.css" type="text/css" />
<link rel="stylesheet" type="text/css" href="../_static/pygments.css?v=72bcf2f2" />
@ -12,7 +12,7 @@
<link rel="stylesheet" type="text/css" href="../_static/graphviz.css?v=eafc0fe6" />
<script type="text/javascript" src="../_static/seiscomp.js"></script>
<script type="text/javascript" id="documentation_options" data-url_root="../" src="../_static/documentation_options.js"></script>
<script data-url_root="../" id="documentation_options" src="../_static/documentation_options.js?v=823bb831"></script>
<script data-url_root="../" id="documentation_options" src="../_static/documentation_options.js?v=744d344a"></script>
<script src="../_static/doctools.js?v=888ff710"></script>
<script src="../_static/sphinx_highlight.js?v=4825356b"></script>
<link rel="index" title="Index" href="../genindex.html" />
@ -25,8 +25,8 @@
<div class="container">
<div class="brand">
<img class="logo" src="../_static/brands/seiscomp/text/white.svg"/>
<!-- span class="title">SeisComP Release</span -->
<span class="version">6.9.0</span>
<!-- span class="title">SeisComP Development</span -->
<span class="version">7.0.0</span>
</div>
</div>
</div>
@ -78,58 +78,58 @@
<section id="description">
<h2>Description<a class="headerlink" href="#description" title="Permalink to this heading"></a></h2>
<p>The <strong>mB</strong>/<strong>mB_BB</strong> magnitude has been recommended by the IASPEI commission
(<span id="id1">Bormann and Saul [<a class="reference internal" href="../base/references.html#id18" title="P. Bormann and J. Saul. The new iaspei standard broadband magnitude mb. Seismol. Res. Lett., 5:698 - 705, 2008. doi:10.1785/gssrl.79.5.698.">38</a>]</span>, <span id="id2">Bormann and Saul [<a class="reference internal" href="../base/references.html#id19" title="P. Bormann and J. Saul. A Fast, Non-saturating Magnitude Estimator for Great Earthquakes. Seismol. Res. Lett., 80(5):808 - 816, 2009. doi:10.1785/gssrl.80.5.808.">39</a>]</span>, <span id="id3">IASPEI [<a class="reference internal" href="../base/references.html#id40" title="IASPEI. Summary of magnitude working group recommendations on standard procedures for determining earthquake magnitudes from digital data. IASPEI Website, 2013. URL: http://www.iaspei.org/commissions/commission-on-seismological-observation-and-interpretation/Summary_WG_recommendations_20130327.pdf.">46</a>]</span>).
(<span id="id1">Bormann and Saul [<a class="reference internal" href="../base/references.html#id28" title="P. Bormann and J. Saul. The new iaspei standard broadband magnitude mb. Seismol. Res. Lett., 5:698 - 705, 2008. doi:10.1785/gssrl.79.5.698.">46</a>]</span>, <span id="id2">Bormann and Saul [<a class="reference internal" href="../base/references.html#id29" title="P. Bormann and J. Saul. A Fast, Non-saturating Magnitude Estimator for Great Earthquakes. Seismol. Res. Lett., 80(5):808 - 816, 2009. doi:10.1785/gssrl.80.5.808.">47</a>]</span>, <span id="id3">IASPEI [<a class="reference internal" href="../base/references.html#id55" title="IASPEI. Summary of magnitude working group recommendations on standard procedures for determining earthquake magnitudes from digital data. IASPEI Website, 2013. URL: http://www.iaspei.org/commissions/commission-on-seismological-observation-and-interpretation/Summary_WG_recommendations_20130327.pdf.">54</a>]</span>).
It is based on amplitude measurements of body waves like <a class="reference internal" href="global_mb.html#global-mb"><span class="std std-ref">mb</span></a>, but
with the amplitude measured in a broad frequency range and longer time windows.
Instead of amplitude measurements on displacement data together with the
dominant period, the maximum velocity amplitude Vmax is taken directly from
velocity-proportional records with <img class="math" src="../_images/math/3e38ca2d603956fc616a5148453d32f873cfdbd0.png" alt="V = 2 \pi A/T"/>. The time window for
velocity-proportional records with <img class="math" src="../_images/math/3e38ca2d603956fc616a5148453d32f873cfdbd0.svg" alt="V = 2 \pi A/T"/>. The time window for
the measurement can be determined by the duration of the high-frequency (1-3 Hz)
radiation (<span id="id4">Bormann and Saul [<a class="reference internal" href="../base/references.html#id18" title="P. Bormann and J. Saul. The new iaspei standard broadband magnitude mb. Seismol. Res. Lett., 5:698 - 705, 2008. doi:10.1785/gssrl.79.5.698.">38</a>]</span>). This time window usually contains the phases
radiation (<span id="id4">Bormann and Saul [<a class="reference internal" href="../base/references.html#id28" title="P. Bormann and J. Saul. The new iaspei standard broadband magnitude mb. Seismol. Res. Lett., 5:698 - 705, 2008. doi:10.1785/gssrl.79.5.698.">46</a>]</span>). This time window usually contains the phases
P, pP, sP, PcP, but not PP. According to the long time window and broad
frequency range used for amplitude measurements mB saturates not like mb.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>In <cite>SeisComP</cite> the term <strong>m_B</strong> is a synonym for <strong>mB_BB</strong> which is used
by IASPEI <span id="id5">[<a class="reference internal" href="../base/references.html#id40" title="IASPEI. Summary of magnitude working group recommendations on standard procedures for determining earthquake magnitudes from digital data. IASPEI Website, 2013. URL: http://www.iaspei.org/commissions/commission-on-seismological-observation-and-interpretation/Summary_WG_recommendations_20130327.pdf.">46</a>]</span>.</p>
by IASPEI <span id="id5">[<a class="reference internal" href="../base/references.html#id55" title="IASPEI. Summary of magnitude working group recommendations on standard procedures for determining earthquake magnitudes from digital data. IASPEI Website, 2013. URL: http://www.iaspei.org/commissions/commission-on-seismological-observation-and-interpretation/Summary_WG_recommendations_20130327.pdf.">54</a>]</span>.</p>
</div>
<section id="amplitude">
<h3>Amplitude<a class="headerlink" href="#amplitude" title="Permalink to this heading"></a></h3>
<p>mB amplitudes are calculated on vertical-component displacement seismograms
in accordance with <span id="id6">Bormann and Saul [<a class="reference internal" href="../base/references.html#id18" title="P. Bormann and J. Saul. The new iaspei standard broadband magnitude mb. Seismol. Res. Lett., 5:698 - 705, 2008. doi:10.1785/gssrl.79.5.698.">38</a>]</span> and similar to <a class="reference internal" href="global_mb.html#global-mb"><span class="std std-ref">mb</span></a>.
in accordance with <span id="id6">Bormann and Saul [<a class="reference internal" href="../base/references.html#id28" title="P. Bormann and J. Saul. The new iaspei standard broadband magnitude mb. Seismol. Res. Lett., 5:698 - 705, 2008. doi:10.1785/gssrl.79.5.698.">46</a>]</span> and similar to <a class="reference internal" href="global_mb.html#global-mb"><span class="std std-ref">mb</span></a>.
A default time window of 60 s is considered for amplitude measurements
at stations in the distance range of 5° to 105°.
If the epicentral is known, the length of the time window after the P wave onset
is</p>
<div class="math">
<p><img src="../_images/math/9d9190e1e9d976d40144e676d30933251d58b7a0.png" alt="t = min(\Delta * 11.5, 60)"/></p>
</div><p>where <img class="math" src="../_images/math/6450616b75212cb568e905db49efd0c3dd584648.png" alt="\Delta"/> is the epicentral distance. The methods for measuring
<p><img src="../_images/math/9d9190e1e9d976d40144e676d30933251d58b7a0.svg" alt="t = min(\Delta * 11.5, 60)"/></p>
</div><p>where <img class="math" src="../_images/math/6450616b75212cb568e905db49efd0c3dd584648.svg" alt="\Delta"/> is the epicentral distance. The methods for measuring
amplitudes are configurable in the global bindings.</p>
</section>
<section id="station-magnitude">
<h3>Station Magnitude<a class="headerlink" href="#station-magnitude" title="Permalink to this heading"></a></h3>
<p>The mB station magnitudes are calculated in accordance with <span id="id7">Bormann and Saul [<a class="reference internal" href="../base/references.html#id18" title="P. Bormann and J. Saul. The new iaspei standard broadband magnitude mb. Seismol. Res. Lett., 5:698 - 705, 2008. doi:10.1785/gssrl.79.5.698.">38</a>]</span>.</p>
<p>The mB station magnitudes are calculated in accordance with <span id="id7">Bormann and Saul [<a class="reference internal" href="../base/references.html#id28" title="P. Bormann and J. Saul. The new iaspei standard broadband magnitude mb. Seismol. Res. Lett., 5:698 - 705, 2008. doi:10.1785/gssrl.79.5.698.">46</a>]</span>.</p>
<div class="math">
<p><img src="../_images/math/c4e29d7f89b54eff7de102b648e87d8c0f96afd6.png" alt="mB = \log \left(\frac{A}{2\Pi}\right) + Q(h,\Delta) - 3.0"/></p>
<p><img src="../_images/math/c4e29d7f89b54eff7de102b648e87d8c0f96afd6.svg" alt="mB = \log \left(\frac{A}{2\Pi}\right) + Q(h,\Delta) - 3.0"/></p>
</div><p>with A as the displacement amplitude in micrometers, T as the dominant period of
the signal in seconds, Q as a correction term for depth and distance.</p>
<ul class="simple">
<li><p>Amplitude unit in <cite>SeisComP</cite>: <strong>nanometers/s</strong> (nm/s),</p></li>
<li><p>Time window: 60 s if set by <a class="reference internal" href="scautopick.html#scautopick"><span class="std std-ref">scautopick</span></a>, otherwise 0 s - 11.5 * distance
(deg) with 60 s minimum</p></li>
<li><p>Default distance range: 5 - 105 deg, configurable: <a class="reference internal" href="global.html#confval-magnitudes.mB.minDist"><code class="xref std std-confval docutils literal notranslate"><span class="pre">magnitudes.mB.minDist</span></code></a>,
<a class="reference internal" href="global.html#confval-magnitudes.mB.maxDist"><code class="xref std std-confval docutils literal notranslate"><span class="pre">magnitudes.mB.maxDist</span></code></a>,</p></li>
<li><p>Default distance range: 5 - 105 deg, configurable: <code class="xref std std-confval docutils literal notranslate"><span class="pre">magnitudes.mB.minDist</span></code>,
<code class="xref std std-confval docutils literal notranslate"><span class="pre">magnitudes.mB.maxDist</span></code>,</p></li>
<li><p>Depth range: no limitation.</p></li>
</ul>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>In 2013 the IASPEI commission (<span id="id8">IASPEI [<a class="reference internal" href="../base/references.html#id40" title="IASPEI. Summary of magnitude working group recommendations on standard procedures for determining earthquake magnitudes from digital data. IASPEI Website, 2013. URL: http://www.iaspei.org/commissions/commission-on-seismological-observation-and-interpretation/Summary_WG_recommendations_20130327.pdf.">46</a>]</span>) recommended a minimum
<p>In 2013 the IASPEI commission (<span id="id8">IASPEI [<a class="reference internal" href="../base/references.html#id55" title="IASPEI. Summary of magnitude working group recommendations on standard procedures for determining earthquake magnitudes from digital data. IASPEI Website, 2013. URL: http://www.iaspei.org/commissions/commission-on-seismological-observation-and-interpretation/Summary_WG_recommendations_20130327.pdf.">54</a>]</span>) recommended a minimum
distance of
20 deg. However, the calibration formula (<span id="id9">Bormann and Saul [<a class="reference internal" href="../base/references.html#id18" title="P. Bormann and J. Saul. The new iaspei standard broadband magnitude mb. Seismol. Res. Lett., 5:698 - 705, 2008. doi:10.1785/gssrl.79.5.698.">38</a>]</span>) which is
20 deg. However, the calibration formula (<span id="id9">Bormann and Saul [<a class="reference internal" href="../base/references.html#id28" title="P. Bormann and J. Saul. The new iaspei standard broadband magnitude mb. Seismol. Res. Lett., 5:698 - 705, 2008. doi:10.1785/gssrl.79.5.698.">46</a>]</span>) which is
integrated in
<cite>SeisComP</cite> allows the extension down to 5 deg while maintaining consistent magnitudes
at 20 deg and beyond. Therefore, 5 deg is used as the default in
<a class="reference internal" href="global.html#confval-magnitudes.mB.minDist"><code class="xref std std-confval docutils literal notranslate"><span class="pre">magnitudes.mB.minDist</span></code></a>.</p>
<code class="xref std std-confval docutils literal notranslate"><span class="pre">magnitudes.mB.minDist</span></code>.</p>
</div>
</section>
<section id="network-magnitude">
@ -211,7 +211,7 @@ in the configuration of
</a>
<div class="stretched align-center fitted content">
<div>
Version <b>6.9.0</b> Release
Version <b>7.0.0</b> Development
</div>
<div class="copyright">
Copyright &copy; gempa GmbH, GFZ Potsdam.