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    <p>Dear Dr. Graizer,</p>
    <p>Thank you very much for the hint to your article in SRL. <br>
    </p>
    <p>Any reason, why you did not include also a link to the reply from
      the authors of the original article?</p>
    <p><a class="moz-txt-link-freetext" href="https://www.seismosoc.org/wp-json/civicrm/v3/url?u=22743&qid=2893552">https://www.seismosoc.org/wp-json/civicrm/v3/url?u=22743&qid=2893552</a></p>
    <p>I think young colleagues learn even more, when they rad both.<br>
    </p>
    <p>Kind Regards,</p>
    <p>K.-G. Hinzen</p>
    <p><br>
    </p>
    <div class="moz-cite-prefix">On 18/02/2021 14:34, Graizer, Vladimir
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:MN2PR09MB5356F3EFDE3E7C2F76DB2D178B859@MN2PR09MB5356.namprd09.prod.outlook.com">
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        <p><span style="font-size:12.0pt;font-family:"Times New
            Roman",serif">Dear Colleagues,<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:"Times New
            Roman",serif">I’d like to draw special attention of
            younger colleagues to a recently published paper appearing
            in SRL:
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:"Times New
            Roman",serif"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:"Times New
            Roman",serif">My article shows the technical and
            ethical benefits of appropriate referencing your
            predecessors.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:"Times New
            Roman",serif"><o:p> </o:p></span></p>
        <p class="MsoNormal"
          style="text-align:center;text-autospace:none" align="center">
          <b><span style="font-size:12.0pt;font-family:"Times New
              Roman",serif">Comment on “Dynamic Tilt Correction
              Using Direct Rotational Motion Measurements” by Felix
              Bernauer, Joachim Wassermann, and Heiner Igel<o:p></o:p></span></b></p>
        <p class="MsoNormal"
          style="text-align:center;text-autospace:none" align="center">
          <b><span style="font-size:12.0pt;font-family:"Times New
              Roman",serif">Abstract<o:p></o:p></span></b></p>
        <p class="MsoNormal"
          style="text-align:justify;text-autospace:none"><span
            style="font-size:12.0pt;font-family:"Times New
            Roman",serif">This article identifies deficiencies in
            paper of Bernauer et al. (2020) in performing and describing
            shake table and numerical/synthetic testing of newly
            designed seismic instruments for recording complex
            translational and rotational motion. In my opinion this is a
            result from a deficiency in referencing previously published
            peer-reviewed papers in this area. I also disagree with
            Bernauer et al. (2020) interpretation of the origin of
            errors in a vertical sensor’s recording since the
            sensitivity of a vertical pendulum type sensor to small
            tilts is much lower than that of the horizontal. Complete
            differential equations of pendulum type horizontal and
            vertical seismometers are presented and examples of
            previously performed numerical and shake table tests of
            seismic instruments are shown.
            <o:p></o:p></span></p>
        <p class="MsoNormal"
          style="text-align:justify;text-autospace:none"><span
            style="font-size:12.0pt;font-family:"Times New
            Roman",serif"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:"Times New
            Roman",serif"><a
href="https://pubs.geoscienceworld.org/ssa/srl/article/doi/10.1785/0220200250/594795/Comment-on-Dynamic-Tilt-Correction-Using-Direct"
              moz-do-not-send="true">https://pubs.geoscienceworld.org/ssa/srl/article/doi/10.1785/0220200250/594795/Comment-on-Dynamic-Tilt-Correction-Using-Direct</a><o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:"Times New
            Roman",serif"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:"Times New
            Roman",serif;color:black;background:white">Vladimir
            Graizer; Comment on “Dynamic Tilt Correction Using Direct
            Rotational Motion Measurements” by Felix Bernauer, Joachim
            Wassermann, and Heiner Igel. <em><span style="border:none
                windowtext 1.0pt;padding:0in">Seismological Research
                Letters</span></em> 2021; doi: </span><span
            style="font-size:12.0pt;font-family:"Times New
            Roman",serif"><a
              href="https://doi.org/10.1785/0220200250" target="_blank"
              moz-do-not-send="true"><span
                style="color:#828282;border:none windowtext
                1.0pt;padding:0in;background:white">https://doi.org/10.1785/0220200250</span></a><o:p></o:p></span></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
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      <pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
    </blockquote>
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