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  • Title: Magmatically triggered slow slip at Kilauea Volcano, Hawaii.
    Author: Brooks BA, Foster J, Sandwell D, Wolfe CJ, Okubo P, Poland M, Myer D.
    Journal: Science; 2008 Aug 29; 321(5893):1177. PubMed ID: 18755967.
    Abstract:
    We demonstrate that a recent dike intrusion probably triggered a slow fault-slip event (SSE) on Kilauea volcano's mobile south flank. Our analysis combined models of Advanced Land Observing Satellite interferometric dike-intrusion displacement maps with continuous Global Positioning System (GPS) displacement vectors to show that deformation nearly identical to four previous SSEs at Kilauea occurred at far-field sites shortly after the intrusion. We model stress changes because of both secular deformation and the intrusion and find that both would increase the Coulomb failure stress on possible SSE slip surfaces by roughly the same amount. These results, in concert with the observation that none of the previous SSEs at Kilauea was directly preceded by intrusions but rather occurred during times of normal background deformation, suggest that both extrinsic (intrusion-triggering) and intrinsic (secular fault creep) fault processes can lead to SSEs.
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