Good research, DJF. Hopefully these 6.0+ quakes won't lead to anything that large.
Yup. Decimal points for Dummies tells us that's equivalent to 9.5 billion megatons.
Pretty soon we will have the naysayers showing up telling us that this is all normal activity, nothing to get excited about, it can't possibly be connected, ad nauseum, as nauseum.
Yet the recent 9.0 was the biggest event by far since the 1964 9.2 at Prince William in Alaska. That quake was the second largest in history, in fact 5 or 6 of the ten greatest quakes ever occurred in the 50's and 60's.
So the 9.0, which adds up to about the 4th largest quake ever recorded, could indeed signal a newly awakened period of heightened seismicity.