A Twitter user took this photo that purports to show serious damage to a building in Napa - a city around three miles (5km) from the epicentre of the earthquake.
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Martin Senn, a chief executive of the Swiss giant for six years, took his own life, according to his family.
The singer demanded a fan stop using a tripod during a live show and advised her to enjoy it "in real life".
Johnny Depp's band the Hollywood Vampires are due to play in Stockholm, Sweden, but face calls for the gig to be boycotted.