6.0+ are rather large quakes. You wouldn't need very much to detect these, and they wouldn't go unnoticed.
In bay area cali, we had a 5.6 last year, and it was the largest quake since the world series quake. That means we have not had a quake that was
above 6.0 in almost 20 years. And this in an area known for big quakes.
www.nytimes.com...
I'm not sure more advanced instruments and recording explains this. These things were surely known even back in the 90's when a quake of that size
hit somewhere.
Statistics are notorious for not telling the entire truth, but I'm not sure if I'm buying the increase of information excuses. I know those things
happen in other areas.
It is interesting to me for other reasons, and I take specific note that it all happens after 2001. But that might just be me being crazy, hope more
info surfaces on this.


not

