Definitely not. The geology of California and the rest of the PNW is wild. I suspect this map only shows the strongest recorded events. There are heaps of geological evidence that the PNW regularly experiences 9.0+ thrust fault earthquakes, but the timescales on which they happen are way outside how long we’ve been measuring this stuff. Check out Full Rip 9.0 if you want to read more about it.
Definitely not. The geology of California and the rest of the PNW is wild. I suspect this map only shows the strongest recorded events. There are heaps of geological evidence that the PNW regularly experiences 9.0+ thrust fault earthquakes, but the timescales on which they happen are way outside how long we’ve been measuring this stuff. Check out Full Rip 9.0 if you want to read more about it.