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flag A study finds the Cascadia and San Andreas faults may trigger major quakes in quick succession, raising disaster response concerns.

flag A new study suggests the Cascadia subduction zone and San Andreas fault may trigger major earthquakes in close succession, with evidence from sediment cores showing paired quake events over thousands of years, including the 1700 Cascadia quake followed by a large San Andreas event. flag Researchers found synchronized turbidite layers indicating simultaneous shaking, implying stress transfer between the faults. flag While the exact frequency remains unclear, the findings challenge the view that these faults operate independently and raise concerns about cascading disasters overwhelming emergency response systems across the Pacific Northwest and Northern California.

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