The <a href="https://en.wikipedia.org/wiki/1920_Haiyuan_earthquake" id="mw5A" rel="mw:WikiLink" title="1920 Haiyuan earthquake">Haiyuan earthquake</a> of 8.5<span about="#mwt70" data-mw='{"parts":[{"template":{"target":{"wt":"M","href":"./Template:M"},"params":{"1":{"wt":"w"}},"i":0}}]}' id="mw5Q" typeof="mw:Transclusion">M</span><sub about="#mwt70">w</sub><span about="#mwt70" typeof="mw:Entity"> </span><link about="#mwt70" href="./Category:Articles_using_Mw_magnitude_scale" id="mw5g" rel="mw:PageProp/Category"/>, rocks the <a href="https://en.wikipedia.org/wiki/Gansu" id="mw5w" rel="mw:WikiLink" title="Gansu">Gansu</a> province in China, killing an estimated 200,000.