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Tracking Submarine Volcanic Activity At Monowai: Constraints From Long‐Range Hydroacoustic Measurements, D. Metz, A. B. Watts, I. Grevemeyer, Mel Rodgers

School of Geosciences Faculty and Staff Publications

Monowai is a submarine volcanic center in the Kermadec Arc, Southwest Pacific Ocean. In the past, activity at the volcano had been intermittently observed in the form of fallout at the sea surface, discolored water, changes in seafloor topography, and T phase seismicity, but there is no continuous record for more recent years. In this study, we investigated 3.5 years of recordings at a hydrophone array of the International Monitoring System, located near Juan Fernández Islands, for long‐range underwater sound waves from Monowai. Results from direction‐of‐arrival calculations and density‐based spatial clustering indicate that 82 discrete episodes of activity occurred between …