3.1 The AACSE
The AACSE took place in 2018-2019 between Kodiak Island and Sanak Island (Abers et al., 2019; Barcheck et al., 2020; Fig. 1a). All experiment data is publicly available and was open immediately upon completion of quality assurance, control and archiving. The AACSE included 75 broadband ocean-bottom seismometers (OBS), 30 broadband land seismometers, several dozen additional nearby permanent and EarthScope Transportable Array seismometers, complementary strong motion sensors and absolute- and differential-pressure gauges, and >3,000 km of active source wide-angle refraction profiles collected by the R/VMarcus G Langseth (Barcheck et al., 2020). The Kodiak node array was deployed in 2019 as a supplement to the larger AACSE. The array consisted of 398 Fairfield autonomous node sensors (from PASSCAL and University of Utah) with 3-component 5-Hz geophones deployed along a ~50 km road network centered on the city of Kodiak (Figs. 1b, 1c and 1d). Sensors were deployed at ~200-300 m station spacing over the course of 6 days (May 18-24) and recovered over 3 days (June 19-21). The full array was operational for 25 days (May 25 – June 18). All continuous waveform data from the node array are available in PH5 format via IRIS Data Services (network code 8J from 2019).