An <span about="#mwt152" data-mw='{"parts":[{"template":{"target":{"wt":"M","href":"./Template:M"},"params":{"1":{"wt":"w"}},"i":0}}]}' id="mw-g" typeof="mw:Transclusion">M</span><sub about="#mwt152">w</sub><span about="#mwt152" typeof="mw:Entity"> </span><link about="#mwt152" href="./Category:Articles_using_Mw_magnitude_scale" id="mw-w" rel="mw:PageProp/Category"/> <a href="https://en.wikipedia.org/wiki/1965_Valparaíso_earthquake_and_the_El_Cobre_dam_failures" id="mw_A" rel="mw:WikiLink" title="1965 Valparaíso earthquake and the El Cobre dam failures">7.4 earthquake in Chile</a> sets off a series of <a href="https://en.wikipedia.org/wiki/Tailings_dam" id="mw_Q" rel="mw:WikiLink" title="Tailings dam">tailings dam failures</a>, burying the town of El Cobre and killing at least 500 people.<sup about="#mwt156" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-30"}}' id="cite_ref-30" rel="dc:references" typeof="mw:Extension/ref"><a href="./March_28#cite_note-30" id="mw_g" style="counter-reset: mw-Ref 30;"><span class="mw-reflink-text" id="mw_w">[30]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-30"><cite about="#mwt153" class="citation web cs1" id="mwCOM"><a class="external text" href="https://earthquake.usgs.gov/earthquakes/eventpage/iscgem858940/impact" id="mwCOQ" rel="mw:ExtLink nofollow">"M 7.4 - Valparaiso, Chile"</a>. <i id="mwCOU">earthquake.usgs.gov</i>. USGS<span class="reference-accessdate" id="mwCOY">. Retrieved <span class="nowrap" id="mwCOc">12 April</span> 2021</span>.</cite><span about="#mwt153" class="Z3988" id="mwCOg" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=earthquake.usgs.gov&amp;rft.atitle=M+7.4+-+Valparaiso%2C+Chile&amp;rft_id=https%3A%2F%2Fearthquake.usgs.gov%2Fearthquakes%2Feventpage%2Fiscgem858940%2Fimpact&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AMarch+28"></span></span>