This archive contains an earthquake waveform dataset and corresponding metadata generated from offshore seismic data collected in 2018-19 as part of the Alaska Amphibious Community Seismic Experiment (AACSE) (Ruppert et al., 2022, SRL; Barcheck et al., 2020, SRL; Abers et al., 2019, EOS). AACSE was deployed May 2018 through August 2019, and the experiment collected seismic data both on- and off-shore along a stretch of the Alaska-Aleutian subduction zone near the Alaska Peninsula. The Alaska Earthquake Center created the authoritative, analyst-checked earthquake catalog for the experiment (Ruppert et al., 2022). Waveforms are cut out relative to the analyst-checked P and S picks, for all events within 350 km epicentral distance. Data are from ocean-bottom seismometers and collocated hydrophones only; no land data are included. Datasets are intended to be used for machine learning training with seismic data.