The 9.1–9.3 <span about="#mwt141" data-mw='{"parts":[{"template":{"target":{"wt":"M","href":"./Template:M"},"params":{"1":{"wt":"w"}},"i":0}}]}' id="mwAUI" typeof="mw:Transclusion">M</span><sub about="#mwt141">w</sub><span about="#mwt141" typeof="mw:Entity"> </span><link about="#mwt141" href="./Category:Articles_using_Mw_magnitude_scale" id="mwAUM" rel="mw:PageProp/Category"/> <a href="https://en.wikipedia.org/wiki/2004_Indian_Ocean_earthquake_and_tsunami" id="mwAUQ" rel="mw:WikiLink" title="2004 Indian Ocean earthquake and tsunami">Indian Ocean earthquake</a> shakes northern <a href="https://en.wikipedia.org/wiki/Sumatra" id="mwAUU" rel="mw:WikiLink" title="Sumatra">Sumatra</a> with a maximum <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Mercalli_intensity_scale" id="mwAUY" rel="mw:WikiLink" title="Mercalli intensity scale">Mercalli intensity</a> of IX (<i id="mwAUc">Violent</i>). One of the largest observed <a href="https://en.wikipedia.org/wiki/Tsunami" id="mwAUg" rel="mw:WikiLink" title="Tsunami">tsunamis</a>, it affected coastal and partially mainland areas of <a href="https://en.wikipedia.org/wiki/Thailand" id="mwAUk" rel="mw:WikiLink" title="Thailand">Thailand</a>, <a href="https://en.wikipedia.org/wiki/India" id="mwAUo" rel="mw:WikiLink" title="India">India</a>, <a href="https://en.wikipedia.org/wiki/Sri_Lanka" id="mwAUs" rel="mw:WikiLink" title="Sri Lanka">Sri Lanka</a>, the <a href="https://en.wikipedia.org/wiki/Maldives" id="mwAUw" rel="mw:WikiLink" title="Maldives">Maldives</a>, <a href="https://en.wikipedia.org/wiki/Malaysia" id="mwAU0" rel="mw:WikiLink" title="Malaysia">Malaysia</a>, <a href="https://en.wikipedia.org/wiki/Myanmar" id="mwAU4" rel="mw:WikiLink" title="Myanmar">Myanmar</a>, <a href="https://en.wikipedia.org/wiki/Bangladesh" id="mwAU8" rel="mw:WikiLink" title="Bangladesh">Bangladesh</a>, and <a href="https://en.wikipedia.org/wiki/Indonesia" id="mwAVA" rel="mw:WikiLink" title="Indonesia">Indonesia</a>; death toll is estimated at 227,898.