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The relationship between earthquake swarms and magma transport: Kilauea volcano, Hawaii

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Abstract

A detailed investigation of earthquake locations and focal mechanisms for swarms associated with intrusive events at Kilauea volcano, Hawaii, further illuminates the relationships among stress state, faulting, and magma transport. We determine the earthquake locations and mechanisms using a three-dimensional crustal model to improve their accuracy and consistency. Swarms in Kilauea's upper east and southwest rift zones, from the years 1980 through 1982, provide clear evidence for the propagation and/or dilation of dikes. Focal mechanisms are predominantly strike-slip, and the faulting and inferred dike orientations can be interpreted quite consistently in terms of the model ofHill (1977). Stresses induced by the summit magma reservoir system strongly control faulting and magma transport in the rift zones close to the summit.

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Karpin, T.L., Thurber, C.H. The relationship between earthquake swarms and magma transport: Kilauea volcano, Hawaii. PAGEOPH 125, 971–991 (1987). https://doi.org/10.1007/BF00879363

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  • DOI: https://doi.org/10.1007/BF00879363

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