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Magnetic Anomalies in the Shadows: Revealing the Poorly Understood Mechanisms behind Localized Ground Magnetic Disturbances

Presentation #215.03 in the session Planetary Space Physics Talks (Oral Presentation)

Published onOct 23, 2023
Magnetic Anomalies in the Shadows: Revealing the Poorly Understood Mechanisms behind Localized Ground Magnetic Disturbances

In recent years, the impact of space weather on technological systems such as power transmission lines and oil/gas pipelines, has become critically important. Space weather poses a serious threat to the regular functioning of satellite and ground-based systems, with one significant hazard being electric geomagnetically induced currents (GICs) in grounded industrial structures. GICs are triggered by rapid changes in the geomagnetic field, particularly at auroral latitudes. Understanding localized ground magnetic disturbances is crucial due to their poorly understood nature and potential implications. This research focuses on the investigation of Localized Ground Magnetic Disturbances (LGMDs) and aims to shed light on the poorly understood mechanisms behind these phenomena. Despite their importance, many aspects of LGMDs remain unknown, including their spatial and temporal scales, the underlying physical processes within the Sun-Earth-Ionosphere system, and their occurrence frequency. To address these knowledge gaps, a dense magnetometer network is required for studying LGMDs effectively. This research discusses plans to develop and deploy such a network specifically tailored for investigating Localized GMDs. The study emphasizes high time resolution magnetic field observations (1 second), the use of multiple stations with a physical separation of less than 100 km, and a sensitivity/precision of approximately 1 nanotesla. In addition, observations will be conducted near the aurora, either at high latitudes. To support the research, an All-sky Camera will be employed. The goal is to explore the correlation between LGMDs and the aurora, aiming to identify potential causal relationships or interactions between these phenomena. By unravelling the mechanisms behind Localized GMDs, this research contributes to a comprehensive understanding of these disturbances in the Earth’s magnetic field.

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