Collocated Geotechnical and Geophysical Test Dataset at Three Sites in Napier, New Zealand

Reliable assessment of liquefaction hazard, particularly in the context of groundwater fluctuations associated with hydroclimatic changes and variability between liquefaction assessment methods, necessitates supplementary data and advanced site characterization methods. To understand liquefaction hazard and its relation to nonstationary groundwater levels in Napier, Hawke's Bay, New Zealand, a two‐part field testing campaign was conducted at three sites during two distinct seasons, dry (November 2023) and wet (June 2024). The investigation combined invasive methods, including cone penetration testing (CPT), seismic CPT (SCPT), and direct‐push crosshole (DPCH), with noninvasive techniques including multichannel analysis of surface waves (MASW), P‐wave refraction, horizontal‐to‐vertical spectral ratio (HVSR), and microtremor array measurements (MAM). This manuscript discusses the details of the field campaign, including field data acquisition, post‐acquisition processing, and potential use of the dataset. Potential applications include regional retrospective and forward‐looking liquefaction analyses, comparison of liquefaction assessment methods, evaluation of seasonal subsurface variability, benchmarking of geophysical inversion approaches, validation of partial saturation corrections in liquefaction analyses, and cross‐validation of groundwater table predictions using multiple complementary methods. The resulting readily available dataset in DesignSafe provides high‐resolution geotechnical and geophysical measurements that advance subsurface characterization, climate‐resilient geotechnical practices, and liquefaction hazard analysis. The dataset is intended to support reproducible research and facilitate broader benchmarking, comparative analyses, and synthesis efforts when integrated with other publicly available datasets.