Magnetic storms observed on Earth's surfacehttps://www.geophysik.uni-muenchen.de/en/seminars/seminars/special-topics-in-paleo-and-geomagnetism-3/magnetic-storms-observed-on-earths-surfacehttps://www.geophysik.uni-muenchen.de/@@site-logo/kopfbildvorlage_Geophysik_23_03_22.jpg