You should look into the supporting data before making comments like this. The evidence for the timeline of past Cascadia zone megaquakes is actually quite sol

You should look into the supporting data before making comments like this. The evidence for the timeline of past Cascadia zone megaquakes is actually quite solid. We can even corroborate the records from North American samples with samples from Japan when the resulting tsunamis caused damage there. This is a good introduction if you want to know more: https://www.youtube.com/watch?v=UJ7Qc3bsxjI https://www.youtube.com/watch?v=UJ7Qc3bsxjI