In the late 90s, I took a geology course at Seattle Central, and the teacher told us the reason Alki Point has such a nice flat area all along the beach is beca

In the late 90s, I took a geology course at Seattle Central, and the teacher told us the reason Alki Point has such a nice flat area all along the beach is because that area used to be the tide flats, but during an ancient earthquake, that entire chunk of West Seattle rose something like 10m in less than a minute and retained that elevation from then on. Is that still the current understanding?