| Summary: | Abstract The 2017 Surtsey Underwater volcanic System for Thermophiles, Alteration processes and INnovative concretes (SUSTAIN) drilling project at Surtsey volcano, sponsored in part by the International Continental Scientific Drilling Program (ICDP), provides precise observations of the hydrothermal, geochemical, geomagnetic, and microbiological changes that have occurred in basaltic tephra and minor intrusions since explosive and effusive eruptions produced the oceanic island in 1963–1967. Two vertically cored boreholes, to 152 and 192 m below the surface, were drilled using filtered, UV-sterilized seawater circulating fluid to minimize microbial contamination. These cores parallel a 181 m core drilled in 1979.This data publication includes the operational data obtained during the drilling. All datasets consist of metadata and data. The metadata part provides basic specifications for each data column of the corresponding data table. Additional to that some explanatory remarks about general naming conventions, data model and formats, value lists and acronyms are shown in Jackson et al. (2019).
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