资源环境科技发展态势分析平台

‘Surges’ in magma supply from the mantle can lead to significant changes in eruptive behavior ( et al., 2012), thus their early identification is critical to long‐term eruption forecasting. Here we document and analyze a two‐orders‐of‐magnitude increase in seismicity in the upper mantle beneath southern Hawaiʻi between 2015‐2020. We interpret the anomalous seismicity, which involved the rapid formation of new multiplets and a change in fault‐plane solution orientations relative to pre‐2015 events, as reflecting a substantial increase, or ‘surge’ in mantle‐derived magma, and we suggest that the intruded magma has been driving concurrent unrest at Mauna Loa, Kīlauea, and Lōʻihi Volcanoes through mechanical stress transfer.

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