That major quake in Szechuan China some weeks ago occurred with quite
a spate of tornadoes in the USA. This led me to suspect that there is
a relationship with them.

Some years ago I noticed a relationship with my (mild) arthritis and
earthquakes, then storms in Madagasgar then tornadoes in the USA. I
get crick of discomfort from a cycling injury a long time ago.

For some reason I thought I could "get" when there was a spate of
tornadoes as they were a given with attacks of cramp.

So here I am now looking at the relationship between Californian
quakes, USA's Mid Western tornadoes and Chinese earthquakes. There are
no reports of tornadoes in the USA at the moment. In fact there is a
marked paucity of the weather related to them:

http://www.spc.noaa.gov/climo/reports/080801_rpts.html

What there is is this:
5.8 08/01 32.0 104.7 SICHUAN-GANSU BORDER REGION, CHINA