Loading ...California returns stretch of coast to Indigenous tribes. ‘This is beyond huge’ – Los Angeles Times https://share.google/
Maybe it’s suspicious but this is what I mean by why now.
The Cascadia Subduction Zone off the Pacific Northwest coast receives significant scientific and public attention. Stretching 700 miles from Northern California to British Columbia, it is a megathrust fault capable of producing a magnitude 9.0+ earthquake. Because a massive quake is considered inevitable, researchers continuously study it and coastal communities are heavily focused on hazard planning.
Recent buzz is driven by new scientific discoveries and the realization that the region is historically overdue for a megaquake. Key points driving the current scientific and public discussions include:
- Tearing Plates: Researchers using seismic imaging have discovered that the oceanic plates subducting under North America (like the Juan de Fuca plate) are actively tearing and fragmenting beneath the surface.
- Segmented Faults: New geologic “ultrasound” data indicates that the fault may not be a single continuous crack, which suggests that tsunamis and earthquakes might behave differently in specific regions.
- Coastal Sinking: Studies have outlined the risk of the coastline violently dropping during a megaquake, which would permanently sink coastal land and dramatically exacerbate tsunami flooding.
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specific risks to California’s coastal areas include:
- Tsunami Hazard: A major magnitude 8.0 to 9.0 earthquake on the CSZ could generate a mega-tsunami. California beaches face real danger from both immediate locally-generated tsunamis and larger, trans-oceanic waves.
- Permanent Land Sinking: Ground-breaking research shows that a significant CSZ earthquake could cause coastal lands (including parts of Northern California) to suddenly and permanently sink by several feet. This would dramatically increase long-term flooding risks when combined with sea-level rise.
- The “Earthquake Gate”: Recent geological studies have found evidence that activity in the Cascadia fault can trigger simultaneous or cascading earthquakes on connected faults, expanding the geographic threat area.
- Historical Evidence: Geologists know the last major rupture happened on January 26, 1700 (creating a magnitude 9.0+ earthquake and a tsunami that hit Japan). Evidence of this quake is documented in the official archives of the Oregon Department of Emergency Management.
- The “Next Big One” Threat: Because the last quake was over 300 years ago, experts consider a major rupture inevitable. The fault releases colossal strain roughly every 250 to 500 years