@article {RN1, title = {Mechanics of fault reactivation before, during, and after the 2015 eruption of Axial Seamount}, journal = {Geology}, volume = {46}, number = {5}, year = {2018}, pages = {447-450}, type = {Journal Article}, abstract = {Ocean-bottom seismic and seafloor pressure data from the Ocean Observatories Initiative{\textquoteright}s Cabled Array were used to study fault reactivation within Axial Seamount (offshore Oregon, USA). Microearthquakes that occurred during 2015{\textendash}2016 were located on portions of an outward-dipping ring fault system that was reactivated in response to the inflation and deflation of the underlying magma chamber. Prior to an eruption in April 2015, focal mechanisms showed a pattern of normal slip consistent with the differential vertical uplift of the caldera floor relative to the rim. During the eruption, seismic activity remained localized along these outward-dipping structures; however, the slip direction was reversed as the caldera floor subsided. After the eruption, as the volcano reinflated and the caldera floor uplifted, these faults exhibited sparser seismicity with a more heterogeneous pattern of slip. Monitoring the evolution of ring fault behavior through time may have utility as a metric in future eruption forecasts.}, issn = {0091-7613}, doi = {10.1130/G39978.1}, url = {://WOS:000431359800019}, author = {Levy, S. and Bohnenstiehl, D. R. and Sprinkle, P. and Boettcher, M. S. and Wilcock, W. S. D. and Tolstoy, M. and Waldhauser, F.} }