National Oceanic and
Atmospheric Administration
United States Department of Commerce


FY 2022

A year-long hydroacoustic survey of the Mariana Islands region

Tepp, G., R.P. Dziak, M.M. Haney, L. Roche, and H. Matsumoto

In Oceans 2021, MTS/IEEE, San Diego, CA, September 20–23, 2021, doi: 10.23919/OCEANS44145.2021.9705805, View online (2022)

The Mariana Islands region hosts interesting geological features as well as abundant biodiversity. The subduction zone and back-arc spreading center have led to active volcanism that can have impacts on local islanders, aircraft flying in the region, and military activities. We deployed a small aperture hydrophone array from June 2017 to June 2018 in the Marianas back-arc to better characterize submarine volcanic activity in the region. In addition, we recorded other activity, including calls from historically understudied Bryde’s whales and T-phases from earthquakes. Here, we describe and discuss preliminary results from the array.

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