A classic. Paleoseismology is a pretty fascinating area of study that involves Japanese tsunami records, tree ring studies, indigenous people's stories, and mo

A classic. Paleoseismology is a pretty fascinating area of study that involves Japanese tsunami records, tree ring studies, indigenous people's stories, and more to create a record of past events; sometimes with unexpected certainty. The last Cascadia event for example occurred around 9 PM or so on January 26, 1700. This Wikipedia article goes into details of the last one and can help explain how it's known even about what time it occurred: https://en.wikipedia.org/wiki/1700_Cascadia_earthquake https://en.wikipedia.org/wiki/1700_Cascadia_earthquake You can still see tree stumps on some Oregon beaches at very low tides, which I would presume were submerged suddenly on occurrence of one of the past earthquakes. Here's an article about the "Ghost Forests" in Oregon: https://beachconnection.net/news/ghostfor010912_650.php https://beachconnection.net/news/ghostfor010912_650.php