Magnetic flux expulsion from the core as a possible cause of the unusually large acceleration of the north magnetic pole during the 1990s

• Published in: Journal of Geophysical Research
• Main Authors: Chulliat, A., Gauthier, Hulot, R. Newitt, L.
• Other Authors: Institut de Physique du Globe de Paris (IPGP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS), Boreal Language and Science Services, Ottawa, Ontario, Canada.
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2010
• Subjects: [SDU]Sciences of the Universe [physics]; New Siberian Islands; North Magnetic Pole
• Online Access: https://hal-insu.archives-ouvertes.fr/insu-01288849; https://hal-insu.archives-ouvertes.fr/insu-01288849/document; https://hal-insu.archives-ouvertes.fr/insu-01288849/file/jgrb7143.pdf; https://doi.org/10.1029/2009JB007143

International audience The north magnetic pole (NMP) has been drifting in a north‐northwesterly directionsince the 19th century. Both local surveys and geomagnetic models derived fromobservatory and satellite data show that the NMP suddenly accelerated during the 1990s.Its speed increased from about...