>They are suddenly concerned about the entire Eastern Seaboard.
It's not a new concern, it's been there all along. What is new is the NOAA anon saying that your tax dollars went into identifying the best place to initiate a landslide in the Canary Islands (La Palma):
https://www.usgs.gov/faqs/how-do-landslides-cause-tsunamis?qt-news_science_products=0#qt-news_science_products
Also mentioned was the mapping of vulnerabilities on the west coast, particularly the Cascadia Subduction Zone, triple junction and Mendocino Ridge:
http://geoprisms.org/newsletters/bathymetric-surveys-ciet/
https://www.pmel.noaa.gov/pubs/PDF/vent2713/vent2713.pdf
https://oceanexplorer.noaa.gov/explorations/14mendocino/welcome.html
This is where the San Andreas heads west to sea. A particular set of circumstances could unleash the faults along the entire west coast including inland faults like the SA:
https://www.oregonlive.com/news/2019/12/cascadia-subduction-zone-could-trigger-san-andreas-quakes-osu-expert-says.html
And remember the cheerful anon who posted about the suspicious drilling into the Yellowstone Hot Spot! Good times!, Cabal fucking with Mother Nature.