Sorry, just finished a discussion with a few folks about this.
Here's an experiment you can do at home to show how weather effects earthquakes.
You will need:
1 brick
1 blowtorch
(optional) one spaceheater
Turn the spaceheater on full blast. Hold the brick in your hand lengthwise, brick pointed up, above the space heater. Now, using the blowtorch, blast the top of the brick for about 30 seconds.
Which did you feel first and more intensely the temperature from the space heater or the brick warming from the blowtorch?
Yeah, well, that's the effect that weather has on 6miles of fragmented rock drifting above a molten core. Granted said crust extends another 6 or so miles before hitting the semi-molten goodness that is the mantel of the planet, and unlike what's going on in the highly variable state of the atmosphere isn't quite so subject to rapid cooling and heating (thus explaining why caves reaching only a few hundred feet into the ground have fairly constant temperatures).
Now, do i think that earthquakes have an effect on weather? Yes, a bit. Since they do alter the above ground which is in a highly relative liquid medium, they can cause things like sonic disturbances and variances in pressure grades. (Think air tsunami, as well as the "boom" and "rumble" that folks hear during earthquakes.) Mind you, such variances are fairly minor and while the do effect some individuals, those folks are very small minority. (The same sorts of folks that get sinus headaches before thunderstorms.)
Mind you, this does explain the various conspiracy nuts who say that the 9/11 was a "controlled demolition job". You know what? i swear i'm going to get a stamp that says "Big Things do not act like Little Things!" and slap folks in the head with that.
God's wrath when I… oh, never mind, that's to do with kittens.
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So… the earth doesn't act like a brick?
Or are you talking about subatomic physics?
Or, wait, is this a statement about classical physics vs. general relativity?
All I know is when I convert from imperial (bigger) to metric (smaller) by 2.54, my recipes don't work out anymore. It's no wonder the US hasn't adopted SI. So yeah, big and little are different.
As an aside, "Feels like earthquake weather" is a running joke in my office. Yes, we're a sad lot.