Back to All Events

Cascadia Day!

  • Throughout Cascadia! (map)

Cascadia Day is May 18. A date chosen to memorialize Mt. St. Helen’s eruption.  On that day people realized, forcefully, that the earth is alive.

This event coincided with the emergence of Plate Tectonic theory in Geology, and discovery of what came to be called in the mid-1980’s, “The Cascadia Subduction Zone.”  Massive forces that make our world—volcanic eruptions, mountain building, mega-earthquakes, huge tsunamis, among others—all came to be seen as part of the same system working deep in the bones of the earth.

Dynamisms shaping the character of our region began to be revealed for the first time.  Everything changed after that….

Earlier Event: May 17
Seattle Cascadia Day Celebrations!
Later Event: June 14
Cascadia Potluck and Art Build