The first of four destructive <a href="https://en.wikipedia.org/wiki/1638_Calabrian_earthquakes" id="mwMg" rel="mw:WikiLink" title="1638 Calabrian earthquakes">Calabrian earthquakes</a> strikes <a href="https://en.wikipedia.org/wiki/Southern_Italy" id="mwMw" rel="mw:WikiLink" title="Southern Italy">southern Italy</a>. Measuring magnitude 6.8 and assigned a <a href="https://en.wikipedia.org/wiki/Modified_Mercalli_intensity_scale" id="mwNA" rel="mw:WikiLink" title="Modified Mercalli intensity scale">Mercalli intensity</a> of XI, it kills 10,000–30,000 people.<sup about="#mwt30" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-4"}}' id="cite_ref-4" rel="dc:references" typeof="mw:Extension/ref"><a href="./March_27#cite_note-4" id="mwNQ" style="counter-reset: mw-Ref 4;"><span class="mw-reflink-text" id="mwNg">[4]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-4"><cite about="#mwt27" class="citation journal cs1" id="CITEREFBosiGalli2003">Bosi, Vittorio; Galli, Paolo (2003). <a class="external text" href="https://doi.org/10.1029%2F2001JB001713" id="mwCB0" rel="mw:ExtLink nofollow">"Catastrophic 1638 earthquakes in Calabria (southern Italy): New insights from paleoseismological investigation"</a>. <i id="mwCB4">Journal of Geophysical Research: Solid Earth</i>. <b id="mwCB8">108</b> (B1). American Geophysical Union: ETG 1-1-ETG 1-20. <a class="mw-redirect" href="./Bibcode_(identifier)" id="mwCCA" rel="mw:WikiLink" title="Bibcode (identifier)">Bibcode</a>:<a class="external text" href="https://ui.adsabs.harvard.edu/abs/2003JGRB..108.2004G" id="mwCCE" rel="mw:ExtLink nofollow">2003JGRB..108.2004G</a>. <a class="mw-redirect" href="./Doi_(identifier)" id="mwCCI" rel="mw:WikiLink" title="Doi (identifier)">doi</a>:<span class="id-lock-free" id="mwCCM" title="Freely accessible"><a class="external text" href="https://doi.org/10.1029%2F2001JB001713" id="mwCCQ" rel="mw:ExtLink nofollow">10.1029/2001JB001713</a></span>. <a class="mw-redirect" href="./S2CID_(identifier)" id="mwCCU" rel="mw:WikiLink" title="S2CID (identifier)">S2CID</a><span id="mwCCY" typeof="mw:Entity"> </span><a class="external text" href="https://api.semanticscholar.org/CorpusID:55937014" id="mwCCc" rel="mw:ExtLink nofollow">55937014</a>.</cite><span about="#mwt27" class="Z3988" id="mwCCg" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Journal+of+Geophysical+Research%3A+Solid+Earth&amp;rft.atitle=Catastrophic+1638+earthquakes+in+Calabria+%28southern+Italy%29%3A+New+insights+from+paleoseismological+investigation&amp;rft.volume=108&amp;rft.issue=B1&amp;rft.pages=ETG+1-1-ETG+1-20&amp;rft.date=2003&amp;rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A55937014%23id-name%3DS2CID&amp;rft_id=info%3Adoi%2F10.1029%2F2001JB001713&amp;rft_id=info%3Abibcode%2F2003JGRB..108.2004G&amp;rft.aulast=Bosi&amp;rft.aufirst=Vittorio&amp;rft.au=Galli%2C+Paolo&amp;rft_id=https%3A%2F%2Fdoi.org%2F10.1029%252F2001JB001713&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AMarch+27"></span></span>