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Study Warns Cascadia Quake Could Trigger San Andreas Disaster

10/9/2025

27 6 Full Breakdown

Summary

Story summary

A study suggests Cascadia subduction zone earthquakes could trigger Northern San Andreas fault quake within hours.
Historical evidence shows this pattern occurred multiple times, including 1425-1475 and 1175-1225.
Emergency managers warn repeats of past earthquakes could yield thousands of deaths and billions in damages.
Sediment analysis and corroborating research indicate a pattern of linked seismic activity, urging preparedness.

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Story summary

A study suggests Cascadia subduction zone earthquakes could trigger Northern San Andreas fault quake within hours.
Historical evidence shows this pattern occurred multiple times, including 1425-1475 and 1175-1225.
Emergency managers warn repeats of past earthquakes could yield thousands of deaths and billions in damages.
Sediment analysis and corroborating research indicate a pattern of linked seismic activity, urging preparedness.