This is chapter 2 of the State of Environmental Science in Svalbard (SESS) report 2025. The Earth’s magnetic dip pole, where the observed field is vertical, and the modelled geomagnetic dipole pole, which is roughly the centre of the auroral oval, are both moving. This leads to changes in the local magnetic field over Svalbard and can affect infrastructure and navigation. For example, runway designations at airports are periodically updated due to shifts in the magnetic orientation. As economic activity and infrastructure expand in Svalbard, understanding magnetic field evolution is increasingly important for long-term planning and operational safety. This 2025 update builds on last year’s SESS report by incorporating magnetic field data from three more stations: Longyearbyen, Ny-Ålesund, and Hopen. The new data confirm the eastward rotation and field strengthening observed at Hornsund, showing consistent magnetic changes across the archipelago. A major advance this year is a new automated method for detecting auroral boundaries in EISCAT Svalbard radar data. This method replaces visual identification with a systematic approach based on electron temperature and density thresholds, including quality controls for consistent boundary identification and separation between dayside and nightside conditions. With the new data, the satellite observations now span 27 years and over 750,000 auroral boundary crossings, and confirm the equatorward motion of auroral boundaries over Svalbard. The automated EISCAT analysis also confirms this trend, showing a declining frequency of auroral boundary detections. Together, these results strengthen confidence in the detected trends. These improvements enable more systematic long-term monitoring and comparison with models. The convergence of the conclusions drawn from satellite remote sensing, ground-based radar measurements, and magnetometer networks demonstrates how integrated observational approaches yield insights impossible to achieve through individual measurement systems.