Deployment of a dense seismic network on La Palma Island (2023-2024) for high-resolution imaging of the velocity structure using passive seismic methods Tortosa, Javier Almendros González, Francisco Javier Carmona, Enrique Martín, Benito Prudencio Soñora, Janire Parera Portell, Joan Antoni Abella, Rafael Araque-Pérez, Carlos José Morales Soto, José Rey Devesa, Pablo Heit, Benjamin Yuan, Xiaohui Ontiveros, Alfonso Melchor, Iván Guerrero Reinoso, Cinthia Carrero, David Serrano Bermejo, Inmaculada Alguacil De La Blanca, Ángel Gerardo Cortés, Guillermo Feriche Fernández-Castanys, Mercedes Martos, Antonio Moreno, Javier Dengra, Miguel Angel Seismic network Large-N deployment Seismic imaging Funding for open access publishing: Universidad de Granada/CBUA. We present the IMAGMASEIS project, a large-N seismic experiment carried out on La Palma (Canary Islands, Spain) between 2023 and 2024, aimed at high-resolution imaging of the crustal and upper mantle structure using passive seismic methods. The project involved the deployment of 235 temporary broadband and short-period seismic stations, supplementing 21 permanent stations, thus creating the densest seismic network ever installed on the island. The main goal is to characterise the magmatic plumbing system beneath Cumbre Vieja volcano, identify magma accumulation zones, and investigate structural changes related to the 2021 Tajogaite eruption. We describe the experimental design, network configuration, instrumentation, deployment strategies, and challenges encountered, including difficult terrain and logistical constraints. Preliminary results demonstrate the potential of the dataset for ambient noise tomography, receiver function analysis, and local earthquake studies. IMAGMASEIS provides a valuable resource for understanding volcanic and tectonic processes in oceanic island settings and serves as a model for cost-effective, high-density seismic deployments in similar environments. 2026-02-10T07:43:56Z 2026-02-10T07:43:56Z 2026-01-15 journal article Tortosa, J., Almendros, J., Carmona, E. et al. Deployment of a Dense Seismic Network on La Palma Island (2023-2024) for High-Resolution Imaging of the Velocity Structure Using Passive Seismic Methods. Surv Geophys (2026). https://doi.org/10.1007/s10712-026-09933-y 1573-0956 0169-3298 https://hdl.handle.net/10481/110780 10.1007/s10712-026-09933-y eng http://creativecommons.org/licenses/by-nc-nd/3.0/ open access Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License Springer