Re: China Earthquake: I checked the major earthquake tracking sites and none are reporting a quake that size. I'm guessing this is a case of 'Grapevine' gone wild, with someone misinterpreting a site like this one:
http://www.brainyhistory.com/events/...920_81222.html that was posting 'This Date In History' notable events data: China did have an earthquake that size in December, 1920.