Earthquakes are not new to the region
#9 | POSTED BY RIGHTISTRITE
This is true, but it's a matter of scale and frequency.
This map shows quakes from 1973-2016.
Could be just better, more sensitive equipment, but it's an interesting data-set.
Then again looking at this real time earthquake map earthquake.usgs.gov shows in the last 24 hours OK has had 15 2.5+mg earthquakes vs 3 in the rest of the US combined and only 1 of those 3 were in CA.