3D P-wave velocity model of the Alaska Peninsula subduction zone from the AACSE active-source data set ...

• Main Authors: Acquisto, Tanner, Bécel, Anne, Canales, JuanPablo, Beaucé, Eric
• Format: Dataset
• Language: English
• Published: Marine Geoscience Data System (MGDS) 2024
• Subjects: Seismic:Velocity:Model; Langseth; Alaska Amphibious Community Seismic Experiment (AACSE); aleut; Kodiak; Alaska
• Online Access: https://dx.doi.org/10.60521/331829; https://www.marine-geo.org/doi/10.60521/331829

This is a 3D, P-wave, crustal-scale velocity model of the Alaska subduction zone that encompasses both the incoming and overriding plates and spans the Semidi segment and the SW Kodiak aspertiy. This model was derived from the traveltime inversion of first-arrivals interpreted from active-source ocean bottom seismometer data and onshore seismometer data acquired as part of the Alaska Amphibious Community Seismic Experiment (AACSE; MGL1903). The model also incorporates data from the 2D OBS profile AL03 acquired as part of the Alaska Langseth Experiment to Understand the MegaThrust (ALEUT; MGL1110) and vertical-component data from TA and AEC stations located on the Alaska Peninsula, Kodiak Island (S19K), and the smaller Sitkinak (SII), Chirikof (CHI), and Shumagin Islands (CHN). We interpreted 42,103 first-arrivals out of 609,915 available traces with 32,024 (76%) coming from 37 of the AACSE instruments, 3,541 (8%) from the 3 AEC instruments, and 6,538 (16%) from the 20 instruments in the AL03 data set. The ...