Magnetotelluric Dataset Related to "Asymmetric Trans-Crustal Magmatic-Hydrothermal System Imaged with Magnetotellurics: Ubinas Volcano, Southern Peru"

This project was developed within the framework of the agreement between the Instituto Geofísico del Perú (IGP) (https://www.gob.pe/igp) and the Institut de Recherche pour le Développement (IRD), France (https://ird.fr/peru). Data Thirteen broadband magnetotelluric (MT) sites were acquired as complementary data during two field campaigns conducted in July and October 2025 using MTU-5C instruments from Phoenix Geophysics, operated by the Instituto Geofísico del Perú (IGP) with support from the IRD. These data complement previously acquired MT data from 2016 (INGEMMET) and 2022 (IGP–IRD). In total, 41 MT sites were used in the study; their locations are shown in Figure 1 of the associated manuscript. The recorded MT time series were processed using ProcMT and FFMT software to estimate frequency-domain magnetotelluric response functions. This dataset supports the analyses presented in the manuscript: Torres, J.-L., Byrdina, S., Tavera, H., et al. (2026). Asymmetric trans-crustal magmatic-hydrothermal system imaged with magnetotellurics: Ubinas Volcano, southern Peru. The repository contains the following files: DATA_MT_EDI.zip – Processed broadband MT responses from 13 stations in EDI format. Sitelist.csv – Geographic locations and metadata for the 13 MT stations acquired in 2025. README.txt – Documentation describing the dataset, data acquisition, processing, repository contents, data provider, and contact information. This dataset is released to promote transparency, reproducibility, and data reuse in future magnetotelluric, volcanological, and geophysical studies of Ubinas Volcano and other active volcanic systems. The dataset may be cited independently using the DOI assigned by Zenodo. Acknowledgments The project was carried out within the framework of the scientific cooperation agreement between the Instituto Geofísico del Perú (IGP) and the Institut de Recherche pour le Développement (IRD), France. The MT data acquisition was funded by the IGP, with additional support from the IRD and CONCYTEC-PROCIENCIA. The authors thank INGEMMET for making the 2016 magnetotelluric data available through the GEOCATMIN platform.