@article{watermann:insu-03611289, TITLE = {{Geomagnetic variations and their time derivatives during geomagnetic storms at different levels of intensity}}, AUTHOR = {Watermann, Jurgen and Gleisner, Hans}, URL = {https://insu.hal.science/insu-03611289}, JOURNAL = {{Acta Geophysica}}, VOLUME = {57}, PAGES = {197-208}, YEAR = {2009}, DOI = {10.2478/s11600-008-0045-7}, KEYWORDS = {geomagnetic variations ; geomagnetically induced currents}, HAL_ID = {insu-03611289}, HAL_VERSION = {v1}, }