The 7.9 <span about="#mwt27" data-mw='{"parts":[{"template":{"target":{"wt":"M","href":"./Template:M"},"params":{"1":{"wt":"w"}},"i":0}}]}' id="mwgQ" typeof="mw:Transclusion">M</span><sub about="#mwt27">w</sub><span about="#mwt27" typeof="mw:Entity"> </span><link about="#mwt27" href="./Category:Articles_using_Mw_magnitude_scale" id="mwgg" rel="mw:PageProp/Category"/><a href="https://en.wikipedia.org/wiki/1906_San_Francisco_earthquake" id="mwgw" rel="mw:WikiLink" title="1906 San Francisco earthquake">earthquake</a> and fire destroy much of <a href="https://en.wikipedia.org/wiki/San_Francisco" id="mwhA" rel="mw:WikiLink" title="San Francisco">San Francisco</a>, <a href="https://en.wikipedia.org/wiki/California" id="mwhQ" rel="mw:WikiLink" title="California">California</a>, killing more than 3,000 people, making one of the worst natural disasters in American history.