It is a very strong one. seismo chart in Utah:
If I was there I'd grab the closest supermodel and hang on!
Thanks for the chart....
At 8.5, that's some aftershock! He also says on his website that there are already panics and blackouts on Sumatra.
Ironically, I was reading about that part of the world last night relative to the Japanese naval action there in WW2 (during April of 1942). This was a couple of months before the Japanese lost most of their aircraft carriers at Midway and at that time, it looked like the Japanese were going to control the entire Indian Ocean. I often wonder how differently the war would have turned out if not for Midway.