Yeah the New Madrid fault also shows another issue with the map - it's measured by epicenter. Several of the New Madrid earthquakes were worse than 4.7 in parts of Tennessee, but those are ignored.
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.