We only know the date for this earthquake due to the record keeping done in Japan when they recorded an orphan tsunami that did not have a local earthquake associated with it. This was then also tied to tree ring dating done on the Pacific Northwest coast where trees were killed when saltwater inundated the land they were on as it subsided.
Cascadia Subduction Earthquake Tsunami Modeling
The Cascadia Rising Earthquake Exercise will generate more interest in the Cascadia earthquake fault. See this tsunami modeling of the 1700 quake.
The last full rip of the Cascadia earthquake fault happened on Jan. 27, 1700. They have taken that event and modeled it, see Tsunami Forecast Model Animation: Cascadia 1700. You can watch it to see how the waves spread and then reverberate across the Pacific Ocean. With the Cascadia Earthquake Exercise coming up in June, there will be much more interest in this earthquake fault system and the potential impacts to our North American coasts and indeed the Pacific Basin.
We only know the date for this earthquake due to the record keeping done in Japan when they recorded an orphan tsunami that did not have a local earthquake associated with it. This was then also tied to tree ring dating done on the Pacific Northwest coast where trees were killed when saltwater inundated the land they were on as it subsided.
We only know the date for this earthquake due to the record keeping done in Japan when they recorded an orphan tsunami that did not have a local earthquake associated with it. This was then also tied to tree ring dating done on the Pacific Northwest coast where trees were killed when saltwater inundated the land they were on as it subsided.
