Sunday, October 26, 2025

The phrase "The Great Quake and the Great Drowning" refers to a massive 1700 earthquake and tsunami in the Pacific Northwest,

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The phrase "The Great Quake and the Great Drowning" refers to a massive 1700 earthquake and tsunami in the Pacific Northwest, documented in both scientific and Indigenous oral histories
. Indigenous stories, once dismissed, provided crucial evidence of the event's timing and severity, combining historical events with mythological battles. These stories served as both a historical record of past devastation and a warning for future preparedness, a lesson that is especially relevant today as scientists warn of another potential megaquake. 
The historical account
  • The event: A megaquake on the Cascadia subduction zone on January 26, 1700, that caused the land to drop and unleashed a powerful tsunami across the Pacific.
  • Scientific evidence: Scientists corroborated the event through geological clues, such as tree rings and soil layers, and even historical records from Japan, which documented a "orphan tsunami" that arrived from an unknown source.
  • Indigenous evidence: Indigenous stories from tribes across the region described a powerful earthquake followed by a devastating flood, using mythological figures like Thunderbird and Whale to recount the event. 

The warning for the future
  • Preparedness: The stories emphasize that a similar event is possible and that the Indigenous peoples of the past developed survival strategies, such as moving inland, tying themselves to trees with long ropes, or taking other actions to survive the "Great Drowning".
  • Modern relevance: Today, these stories are seen as a vital resource for understanding the risks and the importance of preparedness for future megaquakes and tsunamis.
  • The warning: Modern scientific warnings of another megaquake reinforce the need to learn from both geological data and the lessons of Indigenous history to prepare for a catastrophic event. 

  • TsuInfo Alert, April 2002 - WA DNR
    Apr 2, 2002 — We discovered a group of stories with common thema- tic elements which, if they can be taken together, show that great ...
    Washington State Department of Natural Resources (.gov)
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