GROUNDSWELL OF GOODWILL TOWARD JAPAN AFTER DISASTERS.
This is a trifle unfortunate. One might deduce from reading the newspapers that groundswell is a purely technical term that can only be applied to group emotions - a groundswell of opinion or support or whimsy - and I suppose that if you thought about the word at all you would assume that it was about swelling ground.
Only partly. A groundswell is a large wave or rise in the level of the sea caused by an earthquake. Yep. Groundswell is another word for tsunami.
Now go and read that headline again.