This letter examines earthquake locations derived using independent teleseismic and hydroacoustic data sets for events along the north-central (15°-35°N) Mid-Atlantic Ridge (MAR) and equatorial (10°S-10°N) East Pacific Rise (EPR). It represents the first large-scale comparison of such data, providing ground-truth information for the teleseismic locations and insight into the process of T-wave generation. An assessment of location accuracy and catalog completeness in these remote ocean settings is critical for explosion monitoring efforts associated with the Comprehensive Test-Ban Treaty (CTBT), as well as seismotectonic studies at mid-ocean ridges (MOR's).

During the last decade, the value of hydroacoustic studies in monitoring...

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