I agree, you never get used to earthquakes! Admittedly, I haven't felt any of the ones we've had here in the Pacific NW the past few years. Either I was out exercise walking or our east wind out of the Columbia River Gorge was shaking the house anyway!
I sure did feel the one in March 1993 (known as the "Spring Break Quake"), though! It certainly put the lie to the concept of "solid ground"!
I hope there was no damage or injuries from yours. Japan has had enough problems! It doesn't make me feel more secure to know that exactly the same scenario could happen here in the Pacific NW, where we have a similar subduction zone that last let loose 312 years ago this month. Incidentally, that one can be dated exactly thanks to Japanese tsunami records!