Earthquake

I just experienced my first earthquake, 地震　じしん jishin. As I was sitting here viewing pictures of a friend's trip to Tokyo, I think I heard it before I felt it. Something started to rumble. Everything started to rumble. It wasn't bad, nothing moved, fell, cracked, smashed, etc. But it was definitely the earth moving underneath me. What an amazing check on insignificance.

I'll do my research and figure out what the scale was (assuming that Okinawa or nearby was the epicenter...perhaps it was a peripheral shock?). I have no idea, but I'm going to guess and say at least 3.0 to be felt. What I do know is that the Richter Scale is logarithmic, meaning a 4.0 is 10 times as powerful as a 3.0. Therefore, I can only begin to imagine what a 7.0 must be like. Waisu desu.

EDIT: Yep! Here's the info: http://www.jma.go.jp/en/quake/

Region Name: Near Okinawa Honto (main island). Under Okinawa, in the magnitude 2 category (this is the JMA Seismic Activity scale - not Richter), you'll see HIGASHISONTAIRA. For a visual reference, the X is the epicenter. I'm the closest blue dot, on the eastern edge of Okinawa. Wow...