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总结
多家媒体援引研究称，科学家通过分析北加州断层带周边成群出现的微小地震，识别出地表难以观测的隐伏断裂与更复杂的地下构造，并在圣安德烈亚斯断层与喀斯喀特断层交汇区域发现疑似“失落”板块碎片迹象。相关结果提示该地区的地震孕育方式与破裂通道可能比既有模型更复杂，或需调整地震危险性评估与应急准备，以更准确研判未来大震风险与影响范围。
正文
Scientists Uncover Hidden Earthquake Threat Lurking Beneath Northern California's Fault Zone Indian Defence Review Tiny earthquakes reveal hidden faults under Northern California Phys.org Fragment of lost tectonic plate discovered where San Andreas and Cascadia faults meet Live Science Scientists Discover a Hidden Earthquake World Beneath Northern California SciTechDaily Swarms of tiny earthquakes uncover secrets of California's big faults SFGATE
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